KR20120135003A - Light control apparatus and led illumination system - Google Patents

Abstract

An LED lighting device comprising first and second LEDs having different emission wavelength ranges and connected in parallel with opposite polarities, and an LED lighting system including a dimming device, wherein the dimming device is a direct current power supply from an alternating current received from an alternating current power source. DC generating unit for generating a; A first operation unit for manipulating the luminance of the illumination light by the lighting of the first and second LEDs; A second operation unit for manipulating the color or color temperature of the illumination light by the lighting of the first and second LEDs; A first control unit for determining the total amount of average current to be supplied to the first and second LEDs at predetermined intervals according to the operation amount of the first operation unit; A second control unit for determining a ratio of average currents to be supplied to each of the first and second LEDs at predetermined intervals in accordance with an operation amount of the second operation unit; The positive current and the second LED to be supplied to the first LED having a ratio of the total amount of average current and the average current determined by the first and second control units at predetermined cycles, using the DC power source obtained by the DC generator. It includes a supply for generating an alternating current containing the negative current to be supplied to the supply and supply to the LED lighting device.

Description

LIGHT CONTROL APPARATUS AND LED ILLUMINATION SYSTEM

The present invention relates to a dimming device of a light emitting diode (LED) light emitting device (LED lighting device), and an LED lighting system including a dimming device and an LED lighting device (LED lighting device).

As a conventional lighting device such as an incandescent bulb or a fluorescent lamp, when the color temperature of an indoor illumination light can be adjusted, both a light source having a high color temperature, such as a halogen lamp, and a light source having a lower color temperature than a halogen lamp, such as an incandescent lamp, The color temperature of the indoor illumination light was replaced by controlling the lighting / lighting out of each bulb light source by the individual switch provided in the room and provided in each bulb light source.

Or a large lighting device that uses a white light bulb as a light source and adjusts color or color temperature using various optical filters is used under special use such as stage lighting where the color of the illumination light such as stage lighting or the color temperature of white becomes an important directing factor. It was used.

Recently, as a lighting device replacing the conventional lighting device, LED lighting devices such as LED bulbs using LEDs (light emitting diodes) as light sources have begun to spread. As a characteristic of LED lighting apparatus, it is mentioned that power consumption is low and durability is high compared with an incandescent light bulb and a fluorescent lamp. It is preferable to implement the adjustment of the color and color temperature of the white light source as described above using a white LED.

Prior arts related to the present invention include a circuit for applying an alternating voltage to both ends of a pair of LEDs or a pair of LED branches (where a plurality of LEDs are connected in series) (for example, Patent Documents 1, 2, and 3). Etc).

In addition, the control signal from the driver circuit performs timing control of conduction and non-conduction for each half-wave of the AC power supply to the first and second LED groups that are connected in parallel and parallel, and the first and second LEDs. There is an LED driving circuit which separately controls the emission time of each group (for example, Patent Document 4).

[Prior Art Literature]

[Patent Document]

[Patent Document 1] US Patent Publication No. 6412971 (Fig. 23, Fig. 25, Fig. 26)

[Patent Document 2] Japanese Patent Application Laid-Open No. 2002-281764 (FIG. 1)

[Patent Document 3] Japanese Patent Laid-Open No. 2005-513819 (FIGS. 2 and 3)

[Patent Document 4] Japanese Patent Application Laid-Open No. 2008-218043

[Patent Document 5] Japanese Patent Application Laid-Open No. 61-138259

[Patent Document 6] Japanese Unexamined Patent Application Publication No. 2008-171984

For example, when the dimming of white illumination is to be realized by using LEDs, a plurality of white LEDs having different color temperatures are prepared, and the color temperature of the illumination light is adjusted to each of these white LEDs by individual lighting / off control. It is possible.

However, if the brightness (light emission amount) and chromaticity (color, color temperature) of the LED light can be varied by adjusting the driving current supplied to a single LED light device, the user can appeal the LED light device to a wide range of users. It becomes possible.

One type of the present invention converts alternating current into direct current, and further converts direct current into alternating current to supply the first and second LEDs connected in anti-parallel, while the brightness and color or color temperature of the first and second LEDs. It is an object of the present invention to provide a technique for making the control possible.

In another aspect of the present invention, a first LED and a second LED generate a current having a total amount and a ratio of an average current for lighting the first LED and the second LED at a desired brightness and chromaticity, and the first LED And a technology capable of supplying a second LED.

According to a first aspect of the present invention, there is provided an LED lighting device including a first LED and a second LED having different chromaticities and a dimming device connected in parallel with opposite polarities. A direct current generating unit for generating a direct current power source from the alternating current received from the alternating current power source; A first operation unit for manipulating the luminance of the illumination light by the lighting of the first LED and the second LED; A second operation unit for manipulating the chromaticity of the illumination light by turning on the first LED and the second LED; A first control section for determining the total amount of average current to be supplied to the first LED and the second LED at predetermined intervals in accordance with an operation amount of the first operation section; A second control section for determining a ratio of an average current to be supplied to each of the first LED and the second LED at each predetermined period in accordance with an operation amount of the second operation section; By using the DC power supply obtained by the DC generator, for each predetermined period, a crystal to be supplied to the first LED having a ratio of the total amount of average current and the average current determined by the first and second control units. An LED lighting system comprising a supply unit for generating an alternating current including one of positive or negative current and the other of positive or negative current to be supplied to the second LED and supplying the alternating current to the LED lighting device. .

Each of the first and second LEDs includes both a parallel connection (anti-parallel connection) in which a single LED element is reversed in polarity and an anti-parallel connection in which a plurality of LED elements are connected in series. Moreover, you may comprise a 1st LED or a 2nd LED by connecting in series with several LED element in the same polarity and paralleling. The "light emission wavelength range" of the LED is a concept including chromaticity, and the chromaticity is a concept including color and color temperature. Therefore, there are cases where the first and second LEDs having different colors are used, or the LEDs having different color temperatures are used as the first and second LEDs. "LED" includes organic light emitting diode (OLED) in addition to the light emitting diode.

In the first aspect of the present invention, the first control unit compares a triangular wave voltage having the same period as the AC voltage of the AC power supply and a reference voltage according to the operation amount of the second operation unit that defines a slice level of the triangular wave voltage. And a comparator for outputting a square wave voltage of the government, and wherein the second controller is configured for each of the periods of the government in one period of the square wave voltage of the government, in accordance with an operation amount of the first operation unit. And a pulse width adjusting circuit for determining a duty ratio of a current to be supplied to the LED lighting device, wherein the supply unit is configured to provide the pulse with respect to the other of the first and second LEDs in a period of definition of the square wave voltage of the government. The positive current is supplied at a duty ratio determined in the width adjustment circuit, and in the negative period of the square wave voltage of the government, for the other of the first and second LEDs, The negative current may be supplied at a duty ratio determined by the pulse width adjusting circuit.

Moreover, in the 1st aspect of this invention, the said supply part inputs the positive pulse and the negative pulse at every said predetermined period, supplies the positive current and the positive current to the said LED illuminating device, and supplies a negative pulse, And a driving circuit for supplying a negative current to the LED illuminating device, wherein the first control section is configured to turn on a positive pulse in a predetermined period and turn on a negative pulse in accordance with an operation amount of the first operation unit. The time may be determined, and the second control unit may be configured to determine the ratio of the on time of the positive pulse to the on time of the negative pulse in the predetermined period according to the operation amount of the second operation unit.

Moreover, in the 1st aspect of this invention, a 1st control part determines the number of pulses of the fixed part which respectively have a predetermined pulse width in the said predetermined period according to the operation amount of the said 1st operation part, and said 2nd The control unit may be configured to determine the pulse width of the above-mentioned pulse.

Moreover, in the 1st aspect of this invention, it can be comprised so that the said dimmer may be connected with the said LED illuminating device only through wiring of two pairs.

Moreover, the 2nd aspect of this invention is an illuminating device connected with the LED illuminating device containing the 1st LED and the 2nd LED which differ in light emission wavelength range connected in parallel with opposite polarity, and are AC power received from an AC power supply. A direct current generator for generating a direct current power supply; A first operation unit for manipulating the luminance of the illumination light by the lighting of the first LED and the second LED; A second operation unit for manipulating the color or color temperature of the illumination light by the lighting of the first LED and the second LED; A first control section for determining the total amount of average current to be supplied to the first LED and the second LED at predetermined intervals in accordance with an operation amount of the first operation section; A second control section for determining a ratio of an average current to be supplied to each of the first LED and the second LED at each predetermined period in accordance with an operation amount of the second operation section; By using the DC power supply obtained by the DC generator, for each predetermined period, a crystal to be supplied to the first LED having a ratio of the total amount of average current and the average current determined by the first and second control units. Or a supply unit for generating an alternating current including one of negative current and the other of positive or negative current to be supplied to the second LED and supplying the alternating current to the LED lighting device.

According to a third aspect of the present invention, there is provided an LED lighting device including a first LED and a second LED having different chromaticity and a dimming device, wherein the dimming device is a direct current from an alternating current received from an alternating current power source. A direct current generator generating power; A first operation unit for manipulating the luminance of the illumination light by the lighting of the first LED and the second LED; A second operation unit for manipulating the chromaticity of the illumination light by turning on the first LED and the second LED; A first control section for determining the total amount of average current to be supplied to the first LED and the second LED at predetermined intervals in accordance with an operation amount of the first operation section; A second control section for determining a ratio of an average current to be supplied to each of the first LED and the second LED at each predetermined period in accordance with an operation amount of the second operation section; The current to be supplied to the first LED having a ratio of the total amount of the average current and the average current determined by the first and second control units at each predetermined period, using the DC power source obtained by the DC generator. And a supply unit generating a current to be supplied to the second LED and supplying the current to the LED luminaire.

A fourth aspect of the present invention includes a first LED and a second LED having different chromaticities; A direct current generator for generating direct current from alternating current; Receiving means for receiving from the light control apparatus information on the total amount of the average current to be supplied to the first LED and the second LED, and ratio information of the average current to be supplied to each of the first and second LEDs; ; Calculating means for calculating the total amount of the average current and the ratio of the average current using information from the total amount information of the average current and information from the receiving means for obtaining the total amount and the ratio of the average current from the ratio information of the average current; And a supply means for generating a current corresponding to the total amount of the average current and the ratio of the average current from the current generated by the DC generator and supplying the current to the first LED and the second LED.

According to one aspect of the present invention, the conversion of alternating current into direct current, further conversion of direct current into alternating current, and supply to the first and second LEDs connected in anti-parallel, ) And chromaticity (color, color temperature) can be provided.

In addition, according to another aspect of the present invention, from the direct current converted from alternating current, the first LED and the second LED generate a current having a total amount and ratio of average currents for lighting with desired luminance and chromaticity, It can provide technology that can supply 2 LED.

1 is a diagram showing an example of a circuit configuration of an illumination system (LED light emitting device and light control device) in the first embodiment.
2 is an explanatory diagram of waveforms in the dimming device in the first embodiment.
3 is an explanatory diagram of waveforms in the light modulation apparatus according to the first embodiment.
4 is a diagram illustrating a circuit configuration example of an illumination system (LED light emitting device and dimming device) in the second embodiment.
5A is an explanatory diagram of waveforms in the dimming device in the second embodiment.
5B is a flowchart showing program processing of the microprocessor in the second embodiment.
6A is an explanatory diagram of waveforms in the light modulation apparatus in the second embodiment.
FIG. 6B is a flowchart showing program processing (luminance raising processing) of the microprocessor in the second embodiment.
FIG. 6C is a flowchart showing program processing (brightness reduction processing) of the microprocessor in the second embodiment. FIG.
FIG. 7A is an explanatory diagram of waveforms in the light modulation apparatus according to the second embodiment. FIG.
7B is a flowchart showing program processing (color temperature lowering processing) of the microprocessor in the second embodiment.
7C is a flowchart showing program processing (color temperature raising processing) of the microprocessor in the second embodiment.
8 is a flowchart showing a program process (polarity conversion process) of the microprocessor in the third embodiment.
FIG. 9 is a diagram illustrating a part of circuit configuration examples of the dimming device of the LED light emitting device according to the fourth embodiment. FIG.
10A is a flowchart showing program processing (feedback control) of the microprocessor in the fourth embodiment.
10B is a flowchart showing program processing (feedback control) of the microprocessor in the fourth embodiment.
FIG. 11 is a diagram illustrating a configuration example of an illumination system (LED light emitting device and light control device) according to the fifth embodiment.
It is a figure which shows the structural example of the light control apparatus in 5th Embodiment.
FIG. 13 is a diagram showing an example of a current waveform supplied to an LED light emitting device in adjusting luminance in the fifth embodiment.
FIG. 14 is a diagram showing an example of a current waveform supplied to the LED light emitting device at the time of color temperature adjustment in the fifth embodiment.
FIG. 15 is a diagram showing an example of a current waveform supplied to an LED light emitting device in adjusting luminance in the modification of the fifth embodiment.
It is a figure which shows the example of the current waveform supplied to an LED light emitting device at the time of color temperature adjustment in the modification of 5th Embodiment.
17A is a perspective view of a schematic configuration of a package in a semiconductor light emitting device (hereinafter referred to as "white LED") constituting a light emitting module (LED module).
FIG. 17B is a diagram illustrating a mounting state of wiring for supplying power to a semiconductor light emitting element (hereinafter referred to as an "LED chip") provided in a package.
FIG. 18 is a diagram schematically illustrating the package (white LED) shown in FIGS. 17A and 17B using an electrical symbol.
19 is a diagram schematically illustrating a state in which the white LEDs shown in FIG. 18 are connected in series.
FIG. 20 is a cross-sectional view when the white LED shown in FIG. 17A is cut off at a plane including wiring. FIG.
It is a figure explaining the mounting to a board | substrate of an LED chip.
It is a figure which shows the structural example of the LED system which concerns on 6th Embodiment.
It is a figure which shows the relationship between the alternating current waveform of the commercial power supply applied to a dimmer, and the alternating voltage supplied to an LED illuminator by the arc of a triac.
24 is an explanatory diagram of waveforms such as an AC voltage and a drive current during dimming.
25 is an explanatory diagram of waveforms such as an alternating voltage, a drive current, and the like during color matching.
Fig. 26 is a waveform diagram illustrating a change in driving current ratio by balance adjustment.
27 is a diagram illustrating an example of a circuit configuration of a lighting system according to the seventh embodiment.
It is a figure which shows the relationship of the manipulated variable and the AC waveform of an operation part.
It is a figure which shows the relationship of the manipulated variable and the AC waveform of an operation part.
30 shows an example of the configuration of an LED lighting system according to the eighth embodiment.
FIG. 31 shows a first form of the control signal generation circuit shown in FIG.
32 shows a second form of the control signal generation circuit shown in FIG.
FIG. 33 shows a first embodiment of a control circuit in the LED lighting fixture shown in FIG. 30.
FIG. 34 shows a second embodiment of the control circuit in the LED lighting fixture shown in FIG. 30.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The structure of embodiment is an illustration, and this invention is not limited to the structure of embodiment.

[First Embodiment]

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the example of the circuit structure of an LED lighting system in 1st Embodiment of this invention. The LED system includes an LED lighting device A and an LED lighting device 20 (also referred to as an "LED light emitting device 20" or a "light emitting device 20") connected to the lighting device A. The light control apparatus A adjusts the brightness | luminance (light emission amount) and chromaticity (color, color temperature) of the illumination light obtained by light emission of LED contained in the LED illuminating device 20. FIG.

Here, the LED lighting device 20 (light emitting device 20) includes an LED group 22A (first LED group) and an LED group 22B (second LED group) connected in parallel to each other in reverse (reverse polarity). One set of LED groups 22A and 22B is included. Each of the LED groups 22A and 22B consists of a predetermined number (for example, 20) of LED elements connected in series. The number of LED elements constituting the LED groups 22A and 22B, respectively, can be appropriately set to one or more. Do. LED groups 22A and 22B are fabricated, for example, on sapphire substrates.

The LED lighting device 20 further includes two terminals 23A, 23B, which appear from each of the wirings connecting the LED group 22A and the LED group 22B in parallel. A government drive current is energized between the two terminals 23A and 23B. During energization of the positive current, one of the LED group 22A and the LED group 22B is turned on and the other is turned off. On the other hand, at the time of energizing a negative electric current, one turns off and the other turns on.

In the example shown in FIG. 1, when the positive driving current is supplied from the terminal 23A, the LED group 22A is turned on, and when the negative driving current is supplied from the terminal 23A, the LED group 22B is turned on. The light control apparatus A and the LED illuminating device 20 are circuit-connected so that it may light up.

In the present embodiment, each of the LED elements included in each of the LED groups 22A and 22B has a light emission wavelength of 410 nm and a terminal voltage when the forward current is 3.5V. When 20 LED elements are connected in series, the maximum amount of light is generated at a direct current of 70V.

Each LED element constituting the LED group 22A constituting the light emitting device 20 is filled with a phosphor that emits about 3000 ° K of white light when qualified (excitation) with light having an emission wavelength of 410 nm. It turns on by supply of one (positive in this embodiment) among the government parts of the alternating current supplied between terminals 23A and 23B.

On the other hand, in each LED element constituting the LED group 22B, a phosphor emitting white light of about 5000 DEG K when buried (excitation) with light having an emission wavelength of 410 nm is embedded, and is supplied between the terminals 23A and 23B. It turns on by supply of the other (part in this embodiment) among the governments of the interchange which becomes.

However, the number of the several LED element which comprises LED group 22A, 22B can be changed suitably, and one LED element may be sufficient. In this embodiment, the LED groups 22A and 22B emit white light of different color temperatures. Above all, in the present specification, the term "emission wavelength range" is a concept including chromaticity (color and color temperature), and the LED groups 22A and 22B may be configured to have different chromaticities. As long as the chromaticity of LED group 22A, 22B differs, the chromaticity which LED group 22A, 22B has respectively can be set suitably.

1 includes a half-wave voltage rectifier circuit 90 (hereinafter referred to as a rectifier circuit 90) as an input terminal 10A and a DC generator, a clock generator circuit 100, and a duty ratio. Push-pull driving circuit 120 (hereinafter referred to as driving circuit 120) having an adjusting circuit 110 and complementary transistors 31 and 32, generating drive pulses for generating a self-oscillating frequency. A variable circuit 130 (hereinafter referred to as pulse width adjusting circuit 130) is provided. The LED lighting device (light emitting device) 20 is driven by the drive circuit 120. That is, the dimming device A supplies a drive current to the light emitting device 20 by using a self-oscillating frequency independent of the commercial AC frequency.

In the dimming device A shown in FIG. 1, the input AC voltage from a commercial power supply (for example, 100 V, 50 Hz) input from the input terminal 10A is rectified by the rectifier circuit 90. That is, the positive voltage is rectified by the diode 11, the positive DC voltage of about 120 V is supplied to the wiring 201, the negative voltage is rectified by the diode 12, and the negative DC voltage of about 120 V is supplied to the wiring 301. Is supplied. The wiring 200 has a common earth potential for the wiring 201 and the wiring 301.

In addition, the comparator (OP amplifiers) 101 and 102 and the pulse width adjusting circuit 130 each of the clock generating circuit 100 and the duty ratio adjusting circuit 110 each have a power supply circuit not shown for circuit operation. ± 5 V is supplied with the wiring 200 as a common earth potential.

The operation of each part of the light control device A (light control circuit) will be described below. 2 and 3 are waveform explanatory diagrams in the dimming circuit. 2A shows an AC voltage input to the input terminal 10A. 2B shows an output waveform from the comparator 101. 2C shows a triangular wave formed by an integrator (resistor R0 and capacitor C0) included in duty ratio adjustment circuit 110. 2D shows an output waveform from the comparator 102. 3 (a) shows the output waveform from the comparator 102, FIG. 3 (b) shows the current waveform supplied to the LED groups 22A and 22B, and FIG. 3 (c) shows the LED group. The current waveform supplied to 22A and 22B is shown typically.

In the clock generation circuit 100, the input AC voltage (50 Hz, 100 V) of the input terminal 10A is supplied from the wiring 210, and the divided voltage determined by the ratio (R1 / R2) of the resistors R1 and R2 is comparator. It is input to 101. The drive of the comparator 101 outputs the square wave voltage shown in FIG. 2 (b) to the wiring 203 on the output side of the comparator 101. The square wave voltage is used as a clock to turn on / off every half cycle period t0 of the input AC voltage (Fig. 2 (a)).

In the duty ratio adjustment circuit 110, a triangular wave is generated by an integration circuit composed of a resistor R0 and a capacitor C0, and is input to the non-inverting input terminal (+ V) of the comparator 102. On the other hand, the inverting input terminal (-V) of the comparator 102 is connected to the wiring 201 through a resistor R3 and the other end is connected to the movable point of the variable resistor 61A connected to the wiring 200. Connected. For this reason, the voltage according to the position of the movable point of the variable resistor 61A is input to the inverting input terminal of the comparator 102 as a reference voltage. The resistance value of the variable resistor 61A can be operated by the operation unit 56 (second operation unit) for toning (color adjustment).

In the comparator 102, the reference voltage serves as the slice level of the triangular wave input from the non-inverting input terminal. In other words, the comparator 102 performs positive output when the triangle wave is higher than the slice level, and performs negative output when the triangle wave is lower than the slice level. Therefore, the comparator 102 outputs a square wave in which the positive period t1 in which the voltage is higher than the reference voltage and the negative period t2 in lower than the reference voltage are alternately repeated (see FIG. 2 (d)). The period t1 becomes shorter as the slice level (reference voltage) becomes higher when the triangular wave input from the non-inverting input terminal is constant. In this way, the comparator 102 functions as a second control section for determining the ratio of the average current of the government in one cycle.

The drive circuit 120 has transistors 31, 32, 33, 34, and the transistors 33, 31 are LEDs of the light emitting device 20 in a period t1 in which the output of the comparator 102 is a positive period. It functions as a switch for supplying a positive driving current to the group 22A through the wiring 220, and the transistors 34 and 32 are in the LED group 22B in a period t2 in which the output of the comparator 102 is a negative period. It functions as a switch for supplying negative drive current through the wiring 220 to the.

The self-oscillating frequency type pulse width adjustment circuit 130 is an adjustment circuit of the drive current amount in the periods t1 and t2 supplied to the LED groups 22A and 22B, and is composed of a pulse width modulation (PWM) circuit. That is, the pulse width modulation circuit 130 has a main structure, and is provided with the self-transmission circuit 95, the pulse duty ratio adjustment circuit 96, and the variable resistor 51B.

The pulse width adjustment circuit 130 controls the duty ratio of the 500 Hz basic pulse generated by the oscillation circuit 95 by the pulse width modulation (PWM) control in the pulse / duty ratio adjustment circuit 96. Adjust the duty ratio according to the resistance value of) and output it. The duty ratio is configured to increase as the resistance value of the variable resistor 51B increases. The resistance value of the variable resistor 51B is operated by the operation part 55 (first operation part) for brightness adjustment. The pulse width adjustment circuit 130 functions as a second control section for determining the total amount of current of the government supplied to the light emitting device 20 in one period.

The output (pulse) of the pulse width adjustment circuit 130 is input to the AND (logical) circuit 35 and the OR (logical sum) circuit 36 to which the output of the comparator 102 is input. The output terminal of the AND circuit 35 is input to the base of the transistor 33, and the base of the transistor 31 is connected to the collector of the transistor 31. Therefore, when the output of the comparator 102 is positive and the output from the pulse width adjusting circuit 130 is on, the AND circuit 35 is turned on, the transistor 33 is turned on, and then the transistor ( 31 is turned on, the driving current by the positive voltage is supplied to the LED group 22A, and the LED group 22A lights up.

On the other hand, in the period in which the output of the comparator 102 is the denial period t2, the OR circuit 36 is turned on in the section where the output of the pulse width adjusting circuit 130 is off, and the transistors 34 and 32 are turned on. Is turned on, the driving current by the negative voltage is supplied to the LED group 22B, and the LED group 22B lights up.

Therefore, as shown in Fig. 3B, in the period t1 and the period t2 (Fig. 3 (a)), the pulse current output from the pulse width adjusting circuit 130 and the pulse-shaped driving current corresponding to the pulse width are LEDs. The group 22A is supplied to the LED group 22B. In this manner, also in the third embodiment, the supply period (duty ratio) of the drive current in each LED group 22A, 22B in one cycle is changed to the operation unit 56 (knobs, etc.) of the variable resistor 61A. By doing so, the power supply amount (drive current amount: average current) for the LED group 22A and the LED group 22B can be different. That is, the color temperature of the light emitting device 20 can be made variable.

And when the resistance value of the variable resistor 51B is adjusted by the operation part 55 (knobs etc.) which are not shown in figure, and the duty ratio of the pulse output from the pulse width adjustment circuit 130 is raised, it is shown in FIG.3 (c). Similarly, the pulse width supplied to the LED groups 22A and 22B is widened. That is, the average current amount of the drive current for each LED group 22A, 22B can be raised. By performing the reverse operation, the average current amount of the drive current for each LED group 22A, 22B can be lowered. In this way, the total light emission amount (luminance) of the light emitting device 20 can be made variable.

In the operating state in which the period t1 as shown in Figs. 2 and 3 is longer than the period t2, the time when the LED group 22A flashes in the positive half cycle of the input AC voltage is the LED group 22B in the negative half cycle of the input AC voltage. This is longer than flashing time. Such blinking of the LED groups 22A and 22B is not felt by the human eye, and the lighting time of the LED group 22B having the color temperature (5000 ° K) higher than the color temperature (3000 ° K) of the LED group 22A. Since it is dominant, blue is perceived as dark white in the human eye.

On the other hand, when the movable point of the variable resistor 61A is closer to the positive potential (the wiring 201 side) than the center point by the operation of the variable resistor 61A, the LED group 22A blinks in the positive half cycle. While the time is shortened, the blinking time of the LED group 22B becomes long in the negative half cycle, so that the lighting time of the LED group 22A having a low color temperature becomes dominant, and the human eye detects it as dark white. do. Since the variable resistor 61A provides the function of adjusting the color tone as described above, the color temperature of the white color emitted by the light emitting device 20 can be continuously varied between 3000 ° K and 5000 ° K.

As described above, in the first embodiment, the total light emission amount of the light emitting device 20, that is, the luminance, can be adjusted by adjusting the resistance value of the variable resistor 51B. When the pulse width output from the circuit 130 is enlarged (duty duty ratio is increased) by the operation of the variable resistor 51B, the wiring which connects between the transistors 31 and 32 and one terminal of the light emitting device 20 is connected. (220; the pulse width of the pulse-shaped current flowing through the other terminal of the light emitting device 20 connected to the wiring 200 (ground), as shown in Fig. 3 (c), both sides of the government As a result, the average current value in the bipolarity of the government increases, and the total amount of light emitted by the light emitting device 20 increases. Therefore, the luminance (light emission amount) by the light emitting device 20 can be adjusted.

According to the structure of 1st Embodiment, since the drive current of alternating current can be supplied to the LED light-emitting device 20 at the autonomous oscillation frequency, flicker (LED light emission by setting a frequency to such an extent that a person cannot recognize a blinking LED). There is an advantage of suppressing the occurrence of). In addition, the drive circuit (in the first embodiment, the drive circuit 120) of the LED light emitting device 20 can be configured with at least one push-pull drive circuit. For example, in the configuration of the third embodiment shown in FIG. 1, instead of the driving circuit 120 and the pulse width adjusting circuit 130, four semiconductor switches (transistors) and control circuits called H-type full bridges are provided. The branch has a known circuit chip (H type full bridge driving circuit: TA8428K (S) manufactured by Toshiba Corp.) so that drive control of the light emitting device 20 based on the output from the comparator 102 is performed. can do.

The input terminal 10A of the first embodiment may receive power from a commercial power supply by means of a plug (not shown), or the input terminal 10A may be connected to a fixed wiring of an indoor commercial power supply to receive power.

[Second Embodiment]

Next, a second embodiment will be described. In 2nd Embodiment, the example which implements the drive control of the light emitting device 20 using a microcomputer (microcomputer) is demonstrated. It is a figure which shows the structural example of the LED lighting system of 2nd Embodiment. In FIG. 4, the LED lighting system includes a light control device B and an LED lighting device (light emitting device) 20 described in the first embodiment. The dimming device B includes an input terminal 10A of an AC power source connected to a commercial AC power source (for example, 50 Hz, 100 V), and a two-voltage DC power supply circuit 140 (hereinafter, referred to as a power supply circuit 140) as a DC generator. ), The main power switch 141, the H-type full bridge driving circuit 150 (hereinafter referred to as the driving circuit 150), and the memory-embedded microprocessor 180 as the first and second controllers (hereinafter, Microcomputer 180) and an X-Y matrix type push button switch 185 (hereinafter referred to as XY switch 185) as the first and second operation units. The drive circuit 150 includes four switching elements (semiconductor switch) and a control circuit 151. As the drive circuit 150, TA8428K (S) made by TOSHIBA Corporation can be applied, for example. In the present embodiment, transistors TR1 to TR4 are applied as the switching elements, but FETs may be used instead of the transistors.

The above-mentioned components of the dimming circuit B are housed in an insulated case of about 10 cm in width and length, not shown, and constitute a dimming device B (lighting control device) of the light emitting device 20. On one surface of the insulated case, the XY switch 185 is provided to be operable from the outside. For example, the insulated case may be installed in a state in which a rear surface of the one surface is installed in a wall of a building, or a part is embedded in a wall of the building while the one surface is exposed to the outside. The input terminal 10A may be connected to a female connector provided in an insulated case, and may include a power cable and a plug as the input terminal 10A. In addition, setting place is not limited to wall surface of building.

The light emitting device 20 is the same as that described in the first embodiment. The light emitting device 20 is in most cases fixed to the ceiling of the room. The two terminals 23A and 23B of the light emitting device 20 are connected to the dimming device B through the wirings 221 and 222, but the present invention is not limited thereto.

The wiring 201A that connects the power supply circuit 140 and the power supply terminals of the control circuit 151 is supplied with a positive DC voltage of about 24V, and the wiring 202A that connects the power supply circuit 140 and the power supply terminals of the microcomputer 180. ) Is supplied with a positive DC voltage of 3.3V. The power supply circuit 140, the microcomputer 180, and the control circuit 151 are connected to the wiring 200A as a common earth potential. The wiring 201A supplies power for turning on the light emitting device 20, and the wiring 202A supplies driving power of the microcomputer 180.

The XY switch 185 has a circuit structure in which both X-rays and Y-rays are short-circuited to the ground terminal G when any one of nine points of intersections of a plurality of X-rays and Y-rays is pressed, and at which intersection Also, when pressed, there is a circuit structure in which the wirings b0 to b5 connected to the input terminals of the microcomputer 180 are held at about 3.3V.

The microcomputer 180 can apply the microprocessor MP which is inexpensive in a memory built-in to the extent that the master clock operates at 4 MHz from the oscillator 181. The input terminal has six input terminals b0 to b5 in addition to the power supply reset terminal res. In addition, the microcomputer 180 is provided with "setN + register" and "setN-register" of 4-bit width, respectively, and the value of the setN + register and the setN-register from the output terminal are set to the next timer 186. Can be set.

The timer 186 is a timer and a counter, which are driven by the ceramic oscillator 187 of a predetermined self-oscillating frequency (1 MHz in this embodiment), and wires 241 and 242 that connect the output terminal and the input terminal of the control circuit 151. ) Outputs the complementary burst pulses shown in Figs. 5A (b) and (c) at a preset timing. This complementary burst pulse has been previously set for the timer 186 so that the pulse frequency is 10 kHz and the burst repetition frequency (Fig. 5A (a)) is about 500 Hz. However, the pulse frequency and burst repetition frequency are examples, and appropriate values can be set.

The register value of the setN + register set in the timer 186 is used to control the number of burst pulses supplied in the positive half cycle. In other words, as the register value of the setN + register increases, the number of burst pulses supplied in the positive half cycle increases. On the other hand, the register value of the setN-register set in the timer 186 is used to control the number of burst pulses supplied in the negative half cycle. In other words, as the register value of the setN-register becomes larger, the number of burst pulses supplied in the negative half cycle increases. By adjusting the counter set in the timer 186, the generation periods T1 and T2 of burst pulses can be changed in each half cycle of the government.

In addition, in FIG. 4, the polarity conversion switch 290 is provided between the wiring 221 and the wiring 222 which bind the control circuit 150 and the light emitting device 20. In the structure of 2nd Embodiment, it is a preferable connection to connect the wiring 222 and the terminal 23A, and to connect the wiring 221 and the terminal 23B. The polarity change switch 290 is substantially connected to the wiring 222 and the terminal by manually performing a switching operation when the wirings 222 and 221 and the terminals 23A and 23B of the light emitting device 20 are connected in reverse. 23A is connected, and the wiring 221 and the terminal 23B are connected. When the polarity is exchanged by the operation of the polarity exchange switch 290, the driving current is supplied from the wiring 221 to the state where the driving current is supplied from the wiring 222 to the light emitting device 20.

The operation of each part of the dimming device B will be described below. First, after the input terminal 10A is connected to the commercial power supply 100V, the main power switch 141 is closed. When the main power switch 141 is closed, the rectification and voltage conversion operations by the power supply circuit 140 are performed, and driving power (DC 3.3V) is supplied to the microcomputer 180. In addition, the reset terminal res is delayed by about 50 msec by the time constants of the resistor R and the capacitor C to become a high potential (hereinafter referred to as "H"), and the operation as the microcomputer 180 is started. .

4, the main power switch 141 can be provided in the center part of the XY switch 185. As shown in FIG. However, the main power switch 141 is a normal main power switch which does not respond to the button operation of the XY switch 185.

The microcomputer 180 starts an initialization operation by a known method, loads an operation program recorded in an internal ROM (Read Only Memory) (not shown) into a random access memory (RAM) not shown, and performs an operation according to the program. Start sequentially from the beginning of the program.

As shown in the flowchart of FIG. 5B, the program operation of the microcomputer 180 after the initialization operation is first performed by the lighting initialization operation for the light emitting device 20 to be in a predetermined standard lighting state (step S01). As a result, the voltages (pulses) of the waveforms shown in FIGS. 5A and 5C are supplied from the wirings 242 and 241 to the driving circuit 150, respectively.

That is, in the period T1 during the first half cycle at the burst repetition frequency T0 (500 Hz), the burst pulse is supplied from the wiring 242 to the control circuit 151 and the period T2 during the second half cycle. In the circuit, burst pulses are supplied from the wiring 241 to the control circuit 151.

The control circuit 151 receives the burst pulse supply from the wirings 242 and 241 and controls the on / off operation (switching operation) of the transistors TR1 to TR4 corresponding to the burst pulse. That is, the control circuit 151 turns off the transistors TR1 to TR4 when there is no pulse input from the wirings 241 and 242. On the other hand, the control circuit 151 turns on the transistors TR1 and TR4 when the pulse is input from the wiring 242, and turns off the transistors TR2 and TR3. For this reason, the direct current from the power supply circuit 140 flows to the wiring 222 through the transistor TR1, and is consumed for lighting the LED group 22A. Thereafter, the current is grounded through the wiring 221 and the transistor TR4.

On the other hand, the control circuit 151 turns on the transistors T3 and T2 at the time of input of the negative pulse from the wiring 241, and turns off the transistors TR1 and TR4. For this reason, the direct current from the power supply circuit 140 flows into the wiring 221 through the transistor TR3, and is consumed for lighting the LED group 22B. Thereafter, the current is grounded through the wiring 222 and the transistor TR2.

Therefore, from the wiring 222 (terminal 23A), the positive pulse group (positive drive current) and the negative pulse group (negative drive current) are alternately supplied. In other words, an alternating current having different polarities is supplied as the driving current to the LED groups 22A and 22B. Specifically, in the period T1 (FIG. 5A (a)), the burst pulse group (FIG. 5A (b)) is supplied from the wiring 242 to the control circuit 151 to the wiring 222. Positive burst pulse current is supplied. On the other hand, when the burst pulse group (FIG. 5A (c)) is supplied from the wiring 241 to the control circuit 151 in the period T2 (FIG. 5A (a)), the negative burst and the wiring 222 are negative. Pulsed current is supplied (see FIG. 5A (d)). Therefore, the waveform of the stationary burst pulse current supplied to the wiring 222 (that is, the drive current for the light emitting device 20) is the same as that of the stationary burst pulse supplied through the wirings 242 and 241 (i.e., The waveform is the same as the waveform of the control signal of the drive circuit 150). "Isomorphic waveform" means a waveform having substantially the same timing of relative on and off of the pulse, and includes both cases where the pulses are different from the same height.

As a result, the LED group 22A lights up with the positive drive current from the wiring 222, while the LED group 22B lights up with the negative drive current from the wiring 222. At this point, since the number (average current) of the burst pulses supplied to the wiring 222 and the wiring 221 is the same, the LED group 22A and the LED group 22B are the same degree (almost equally), respectively. It turns on and maintains the white state of moderate color temperature.

As described above, according to the preset frequency setting for the timer 186, one cycle T0 is 2 msec (500 Hz), and each of the output periods T1 and T2 of the burst pulse is 500 µsec in the first half and the second half of one cycle. It is set. Therefore, the envelope waveform of one cycle shown in FIG. 5A (a) is a rectangular alternating current of 500 Hz. Therefore, the real current waveform flowing through the wiring 222 through the light emitting device 20 is repeated between alternating positive and negative bust with a pulse width of 50 µsec (t1) (Fig. 5A). (d)). The operation up to this point proceeds only by closing the main power switch 141.

In addition, since it is difficult to express a pulse with a pulse width of 50 microseconds with respect to FIG. 5A (d), it is typically shown with a pulse width thicker than actual. Thus, the operation of step S01 in FIG. 5B is finished.

Thereafter, the microcomputer 180 starts the contact scan operation of the XY switch 185 and continues the standby state until the press is detected (Fig. 5B, loops in steps S02 and S03).

In addition, although not shown in FIG. 5B, in the standby state, when the count of the standby timer (not shown) is started and the depression is not detected until the standby timer has timed out (when there is no dimming operation by the user) The main power switch 141 is cut off (opened). For this reason, the light emitting device 20 returns to an unlit state.

When the user performs dimming operation, that is, pressing a button on the XY switch 185, the microcomputer 180 can display a "U (UP)" button, a "D (DOWN) button," The L (LOW) "button and the" H (HIGH) "button, whichever is pressed, are determined based on the on / off (1/0) pattern of the wirings b0 to b5 (step S04). The operation proceeds when it is pressed.

That is, when the U button is pressed, the luminance (light emitting amount) raising process (step S05) is executed, and when the D button is pressed, the luminance (light emitting amount) lowering process (step S06) is executed. When the L button is pressed, the chromaticity (color temperature in this embodiment) increase processing (step S07) is executed, and when the H button is pressed, the chromaticity (color temperature in this embodiment) decrease processing (step S08) is executed. Details of the processing from step S05 to S08 will be described later. When any of the processes in steps S05 to S08 is executed, the values of "setN + register" and "setN-register" of the microcomputer 180 change. When any of steps S05 to S08 ends, the microcomputer 180 sets the values of "setN + register" and "setN-register" to the timer 186 (step S09), returns the processing to step S02, and scans the contacts. Resume processing.

Hereinafter, the details of the steps S05 to S08 will be described individually. First, an operation for an operation of a user (operator) intended to increase or decrease the luminance (light emission amount) of the light emitting device 20 will be described. For example, when the operator presses the U button, the microcomputer 180 detects that the U button is pressed, and performs the process according to the flow of the process of step S05, that is, the luminance raising process shown in Fig. 6B.

In FIG. 6B, first, the microcomputer 180 drives an electronic sound generator (not shown) to generate a detection sound (for example, a "pick" sound) in order to inform the operator of the detection of a button press (step S051). . In addition, the dimming device B may be provided with an LED for detecting detection and the like, and the LED or the like may be turned on for a predetermined time with the output of the detection sound or in place of the detection sound.

Next, the microcomputer 180 refers to the values N of setN + registers (not shown) and setN-registers (not shown) built in the device, and determines whether the value N is equal to or greater than a predetermined upper limit value. (Step S052). At this time, when the value N is equal to or higher than the upper limit value (S052, NO), the user repeatedly increases the brightness and continues to press the button beyond the highest brightness determined by the performance of the LED element, and goes to the error processing routine (step S055). Going forward, it is known that it is an operation error.

On the other hand, when the value N is smaller than the upper limit value (S052, YES), the microcomputer 180 drives the output port to the wiring 183, and the setN + register built in the timer 186 is YES. For example, the value "100 (4 of decimal)" is written (step S053). Before this writing, the setN + register holds the initial value "011" written in the register in the initialization operation (step S01), and the value of the setN + register is increased by the process of step S053.

Next, the microcomputer 180 drives the output port to the wiring 184, and also writes the value "100" equal to the increase value of the setN + register to the setN-register built in the timer 186 (step). S054). Before this write, the setN-register holds the initial value "011" in the initialization operation, and the value of the setN-register increases by the writing of step S054. Thereafter, the process returns to step S09.

By the processing of steps S053 and S054, the out + line (wiring 242) of the timer (counter) 186 is, for example, 4 in a predetermined period T1 in the first half of one cycle, as shown in Fig. 6A (d). Pulses are output, and four pulses are output to the out-line (wiring 241) of the timer (counter) 186, for example, in a predetermined period T2 in the second half of one cycle, for example. . As a result, the light emitting device 20 driven by the control circuit 150 is supplied with a pulse current four times three times, that is, 33% more than the initial value shown in Fig. 6A (f) through the wiring 222, The luminance (light emission amount) from the light emitting device 20 increases by approximately 33%.

Thereafter, when the user presses the U button with the intention of increasing the luminance once more, the above-described processing and operation are repeatedly performed, and the luminance (light emission amount) of the light emitting device 20 is five times three times the initial value, that is, A brightness improvement of 66% is obtained. In this way, a process of increasing the luminance is performed.

The reduction of the luminance (light emission amount) is also performed in almost the same order as the luminance increase. That is, when the D button, which is the brightness reduction button, is pressed, the luminance reduction processing of S061 to S064 shown in Fig. 6C is performed as the processing of step S06 from step S04 (Fig. 5B). The processing of steps S061 to S064 is performed in step S062 except that error processing (step S065) is performed when the value N of the register is equal to or less than a predetermined lower limit value, and the reduction of the register value is performed in steps S063 and S064. Same as the processing shown in 6b. The register value is reduced by " 001 " in binary numbers each time the D button is pressed once.

Therefore, if the D button is pressed once immediately after the initialization operation (step S01), two thirds of the initial values, that is, 33% of the total amount of light (luminance) decreases, and if it is pressed twice, three minutes of the initial values. 1, that is, a total light amount reduction of 66% is obtained. However, the rate at which the luminance (light emission amount) increases or decreases by pressing the U button or the D button once can be appropriately set.

The above has described the increase and decrease of luminance (light emission). Next, the procedure of changing chromaticity is demonstrated. In the second embodiment, the light emitting device 20 is composed of an LED group 22A having a low color temperature of 2500 DEG K (K is Kelvin temperature) and a high LED group 22B having a color temperature of 6000 DEG K. Therefore, when the drive current flowing through the LED 22A is increased and the drive current flowing through the LED 22B is decreased, the color temperature of the entire light emitting device 20 can be lowered.

In the case of lowering the color temperature, the user (operator) presses the L button of the XY switch 185. Then, the color temperature reduction process (FIG. 7B) of step S07 is performed through the determination process of step S04 by the microcomputer 180. As shown in FIG.

As shown in FIG. 7B, when the processing is started, the operation sound generation processing is performed (step S071). Next, the microcomputer 180 determines whether or not the value of the setN + register is lower than the upper limit value (step S072). If the register value of the setN + register is equal to or higher than the upper limit value (S072, NO), error processing is performed (step S075).

On the other hand, if the register value is less than the upper limit value (S072, YES), the microcomputer 180 adds a predetermined value (for example, binary " 001 ") to the setN + register (step S073). On the other hand, the microcomputer 180 subtracts a predetermined value (for example, binary " 001 ") from the setN-register (step S074). Thereafter, the process returns to step S09.

In step S073 and step S074, as shown in FIG. 7A (d), the number of pulses output to the wiring 242 increases, while as shown in FIG. 7A (e), the pulses output to the wiring 241. The number decreases.

As shown in FIG. 7A (f), the average value of the constant current supplied to the LED group 22A of the light emitting device 20 is increased via the wiring 222, while the negative current supplied to the LED group 22B is increased. The average value of decreases. As a result, the luminance (emission amount) from the LED group 22A having a low color temperature increases, and the luminance (emission amount) from the LED group 22B having a high color temperature decreases, so that the color temperature as a whole decreases to a reddish white color. do.

On the other hand, when raising the color temperature, the user (operator) presses the H button of the XY switch 185. Then, the color temperature raising process (FIG. 7C) of step S08 is performed through the determination process of step S04 by the microcomputer 180. FIG.

As shown in FIG. 7C, when the process is started, the operation sound generation process is performed (step S081). Next, the microcomputer 180 determines whether the value of the setN-register is less than the upper limit (step S082). If the register value of the setN-register is greater than or equal to the upper limit value (S082, NO), error processing is performed (step S085).

On the other hand, when the register value is less than the upper limit value (S082, YES), the microcomputer 180 subtracts a predetermined value (for example, binary " 001 ") from the setN + register (step S083). On the other hand, the microcomputer 180 adds a predetermined value (for example, binary " 001 ") to the setN-register (step S084). Thereafter, the process returns to step S09.

In step S083 and step S084, the number of pulses output to the wiring 242 decreases, while the number of pulses output to the wiring 241 increases. For this reason, the average value of the constant current supplied to the LED group 22A of the light emitting device 20 through the wiring 222 decreases, while the average value of the negative current supplied to the LED group 22B increases. As a result, the luminance (emission amount) from the LED group 22A having a low color temperature is reduced, and the luminance (emission amount) from the LED group 22B with a high color temperature is increased, so that the color temperature as a whole increases to white with blue color. do.

According to the second embodiment, the brightness (light emission amount) and chromaticity (color temperature) of the light emitting device 20 can be changed using the microcomputer 180.

[Third embodiment]

Next, a third embodiment will be described. Since 3rd Embodiment is corresponded to the modification of 2nd Embodiment, the difference with 2nd Embodiment is demonstrated, and description is abbreviate | omitted about common point.

The timer 186 shown in Fig. 4 prevents a sudden increase in the number of buttons pressed against the operator's intention when the operator keeps pressing the button, and also realizes a function of preventing a mechanical error such as chattering. It is.

In the circuit configuration shown in Fig. 4, it is unclear whether which of the wirings 222 and 221 is connected to the positive electrode terminal (terminal 23A) and the negative electrode terminal (terminal 23B) of the light emitting device 20, so that it is a control device output line. A polarity exchange switch 290 for exchanging polarities of the wirings 222 and 221 is added.

The third embodiment shows an example in which the polarity exchange switch 290 is realized by program execution by a computer (for example, a microcomputer). 8 is a flowchart according to the third embodiment.

In FIG. 8, the flow process enclosed by block 510 is the lighting control program shown by FIG. 5B, and the flow process enclosed by block 520 is an output polarity exchange program which concerns on 3rd Embodiment. In execution of the output polarity exchange program, the microcomputer 180 operates as follows.

In step S521, in the " = previous button? &Quot; routine, the microcomputer 180 performs a comparison with the " previous button type storage register " The last button type storage register can be prepared for the microcomputer 180, and a code indicating the type of the button pressed last by the user (operator) is stored.

The microcomputer 180 stores a code indicating the type of the button pressed this time in the button type storage register registered last time when the button type indicated by the previous button type storage register and the button pressed this time are not the same. The process returns to step S02. On the other hand, if the button type indicated by the last button type storage register and the button type pressed this time are the same (S521, Yes), 1 is added to the value N1 of the counter (not shown) (step S522).

Each time the same button is kept pressed, the value of the counter rises, finally reaching a predetermined value. In the example of the fifth embodiment, if the operator presses the same button continuously for about 5 seconds or more, and the value N1 of the counter exceeds the predetermined value "50", the process proceeds to step S524.

In step S524, the microcomputer 180 swaps the output terminal (out +) of the "setN + register" and the output terminal (out-) of the "setN- register" provided in the microcomputer 180. As shown in FIG. For this reason, the burst pulse based on the value of the setN-register is output to the wiring 242, and the burst pulse based on the value of the setN + register to the wiring 241 is output. For this reason, the wiring 222 is in a state in which an alternating current with reversed government is supplied. Here, if the light emitting device 20 is connected in the reverse direction, that is, the wiring 222 and the terminal 23B are connected, and the wiring 221 and the terminal 23A are connected, a positive driving current is supplied to the wiring 222. When the LED group 22B is turned on, the LED group 22A is turned on when the negative drive current is supplied. However, as described above, since the correspondence relationship between the register value and the LED group is the same as that of the normal connection, the light emitting device 20 performs the same lighting operation as the normal connection even if the connection is reverse. Therefore, in the third embodiment, the polarity exchange switch 290 can be omitted.

According to the third embodiment, by the above-described output polarity exchange function, the person in charge of installation construction sees the result of the lighting, so that the direction of color matching (increase / decrease in chromaticity (color temperature)) matches the display of the dimming / color matching device. 185 can be operated and the wirings 222 and 221 and the terminals 23A and 23B can be switched to a state in which they are normally connected.

[Fourth Embodiment]

Next, a fourth embodiment will be described. Since 4th embodiment has in common with 2nd and 3rd embodiment, the difference with 2nd embodiment is demonstrated, and description is abbreviate | omitted about a common point.

In most cases, the light-emitting device 20 has a negative temperature coefficient of equivalent resistance value, and if the temperature of the installation place rises, the equivalent resistance value decreases and the current value rises, causing the device temperature to fall into the self-destruction loop. There is. In order to reliably prevent this, it is known that it is effective to provide a feedback loop in the drive circuit. 4th Embodiment adds a feedback loop to the structure of 2nd Embodiment.

9 shows an example of the circuit configuration of the light modulation apparatus according to the fourth embodiment, and FIGS. 10A and 10B are flowcharts showing processing of the microcomputer in the fourth embodiment. In FIG. 9, illustration of the input terminal 10A, the main power switch 141, the power supply circuit 140, and the XY switch 185 shown in FIG. 4 is abbreviate | omitted.

In Fig. 9, the dimming device (lighting control circuit B1) has a drive current detection circuit 160 for realizing a constant current drive, and the drive current detection circuit 160 has a resistor 165, each optically independent photo. Integrator circuits 163 and 164 including couplers 161 and 162, resistors and capacitors (capacitors) are included.

The resistor 165 has a resistance value of, for example, about 5 Ω, and generates a voltage of 0.5 to 5.0 V in proportion to the current value of 0.1 to 1.0 A of the light emitting device 20. The photo couplers 161 and 162 are connected in parallel to the resistor 165. Since a diode is provided on the input side of each photo coupler 161 and 162, the combination transistor is turned on only in each forward direction.

Therefore, when the positive current for driving the LED group 22A flows through the wiring 222, the photo coupler 161 conducts, and a negative current for driving the LED group 22B which is reversely connected to the wiring 222. The photo coupler 162 conducts only when it flows. The conduction of the photocouplers 161 and 162 charges the integrating circuit 163 and the integrating circuit 164 independently, and as a result, a voltage proportional to the average value of the positive current is observed in the wiring 312 and the wiring 322. ), A voltage proportional to the average value of the negative current is observed.

The observed voltage is mainly proportional to the average value of the pulse current flowing through the wiring 222 as the control output line, but at the same time, it is also sensitive to variations in the DC component generated due to temperature changes and the like. This analog value is drawn to the microcomputer (MP) 186A through independent wirings 312 and 322. The microcomputer 186A has the following structures and functions in addition to the functions of the timer 186 described in the second embodiment.

In the microcomputer 186A, the analog / digital converter (not shown) converts the analog value into four bits into a digital numerical representation of 16 values, and stores it in an internal register (not shown). Each voltage value (digital value) from the wiring 312 and the wiring 322 stored in the internal register has the same representation format as setN + register and setN-register, and the value represented by each setN register is connected through the wiring 222. The voltage value corresponding to the drive current supplied to each LED group 22A, 22B is shown.

Thereafter, the operation according to the program execution by the microcomputer 186A shown in FIGS. 10A and 10B is performed. In Fig. 10A, the flow processing surrounded by block 530 is composed of a constant current feedback routine S531 and a negative current feedback routine S532 as a constant current driving routine. The constant current drive routine S530 starts when the button of the XY switch 185 is not pressed (S03, NO) in the contact scan operation (step S02).

In the constant current pit back routine S531 of the constant current driving routine 530, as shown in FIG. 10B, the microcomputer 186A reads the voltage value input from the wiring 312 (step S5311), and the value obtained by A / D conversion. n + is stored in the temporary register (internal register) (step S5312). Next, the microcomputer 186A reads the register value N + held in the setN + register (step S5313), compares the register value N + with the internal register value n + (step S5314), and if it is the same, skips step S5315 and step S5321. Proceeds to and overwrites the value of the setN + register with the internal register value n + (step S5315) to end the constant current feedback routine S531.

Similar processing is performed in the negative current feedback routine S532. As shown in FIG. 10B, the routine S532 performs the same processing as the routine S531. That is, the microcomputer 186A reads the voltage value n − of the wiring 322 (step S5321), and stores the value n − obtained by A / D conversion in a temporary register (internal register) (step S5322). Next, the microcomputer 186A reads out the register value N- held in the setN-register (step S5323), compares it with the internal register value n- (step S5324), and if it is the same, skips step S5325, if different. The setN-register is overwritten with the internal register value n- (step S5325), and the negative current feedback routine S532 is completed. When the routines S531 and S532 are completed, the result is a waiting state (step S02) of scanning the state of the XY switch 185.

According to the above first to fourth embodiments, regardless of whether the light emitting device 20 is an LED bulb or an LED light emitting module, whether the light emitting device 20 is assembled as a light emitting device mechanism or is configured as a light bulb, the light emitting device 20 is The branch can be connected to two terminals 23A and 23B, and the brightness (light emission amount) of the light emitting device 20 is controlled by supplying the drive current to the LED groups 22A and 22B having different polarities of the light emitting device 20. Can be adjusted (lighting) and chromaticity (color, color temperature).

This has the advantage that dimming and dimming of the light emitting device 20 can be realized by using existing wiring in a building. Moreover, although it is applicable to providing the light-emitting device 20 in a newly constructed building and implement | achieves the light control and dimming function, it also has the advantage that a special wiring like 3 wires and 4 wires is unnecessary.

Moreover, like a desktop lighting apparatus, there exists an advantage which can be implement | achieved in the form of the "intermediate switch" which inserts the dimming and color control means of the light emitting device 20 in the middle of a power cord.

Among other useful forms of use, the advantage is that a plurality of bulb sockets are mounted on the ceiling in a parallel connection to an existing building, the flashing switch is mounted on the wall, and commercial AC power is supplied to the flashing switch box. Exerted.

In this case, it is only necessary to replace the incandescent bulb with the light emitting device 20 which emits light at the two kinds of color temperatures as described in the present embodiment, and replace the flashing switch with the dimming and dimming device as described in the present embodiment. Thus, the light dimming / coloring function can be realized without requiring a change of wiring.

[Fifth Embodiment]

Next, an LED lighting system according to a fifth embodiment of the present invention will be described. A pair of lead wires are drawn from the power supply (commercial power supply) to the installation position of the light control device by the wiring state given to the building, and between the installation position of the light control device and the installation arrangement of the LED lighting device, The feeder may be laid in advance. In such a case, the drive current adjusted by the control circuit mounted in the dimmer can be supplied to an LED illuminating device.

In the fifth embodiment, when a pair of feed lines from a power source are connected to the above-described light control device, and a wiring structure in which the light control device and the LED lighting device are connected to two feed lines (driving current supply line) is applicable, The LED lighting system including the light control device and the LED lighting device will be described.

It is a figure which shows the outline of the circuit structure of an LED lighting system in 5th Embodiment, and FIG. 12 is a figure which shows the structural example of the control circuit shown in FIG. 11 shows an outline of a circuit configuration of the LED lighting system.

11 shows an electric wiring installation space (upper side of the virtual line 403), an illuminating device (light box) 410 and an LED lighting device (light emitting) connected to an electric wiring installation space (upper side of the virtual line 403) by bordering the imaginary line 403 shown by a dashed-dotted line. The installation space (lower side of the virtual line 403) of the LED lighting system in which the device 20 is disposed is shown.

The electrical wiring installation space is usually installed in the wall or behind the ceiling and is separated from the lighting system installation space by the wall or ceiling. In the example shown in FIG. 11, a pair of commercial power supply bus | wires 400 supplied with commercial power (for example, AC 100V, 50Hz) to an electrical wiring installation space, and a pair of power supply lines 401 for lighting devices (401; 401a, 401b) ) And a lead wire 402 for blinking a pair of lighting devices drawn out from the commercial power bus line 400 are wired.

The lead wire 402 is connected to a pair of terminals T1 and T2 on the input side of the light control device 410. The dimming device 410 has a pair of terminals T3 and T4 on the output side, and the terminals T3 and T4 are connected to the feeder lines 401 (401a, 410b) for the lighting device. On the other hand, the LED lighting apparatus (light emitting device) 20 which has a pair of terminal 23A, 23B is connected to the power supply line 401 for lighting apparatuses. The LED illuminating device 20 is equipped with the LED group 22A and LED group 22B which were antiparallel-connected similarly to the LED illuminating device demonstrated in 1st Embodiment. In the fifth embodiment, however, the Kelvin temperature of the white light emitted by the LED group 22A is higher than the Kelvin temperature emitted by the LED group 22B.

The dimming device 410 may receive an AC voltage from a commercial power supply supplied from the terminals T1 and T2. For this reason, the light control apparatus 410 includes the full-wave rectification type DC power supply circuit (power supply circuit; 412) which functions as a direct current | flow generation part. The power supply circuit 412 can provide a stable DC power supply regardless of the conduction state of the load.

The power supply circuit 412 is connected to the control circuit 413 through the DC power supply lines 414 and 415. When the commercial AC power supply has an execution value of 100 V, the power supply circuit 412 becomes a DC power supply that supplies a DC voltage of almost 140 V at no load through the power supply lines 414 and 415.

In FIG. 12, the control circuit 413 includes an operation amount detection unit 417 connected to the operation unit 416, a control device 420 serving as the first and second control units, and a driving device 430. . The driving device 430 includes a driving logic circuit (control circuit) 431 and a driving circuit 432 which is an H-type bridge circuit. The output terminal of the drive circuit 432 is connected to the terminals T3 and T4 and is connected to the LED lighting device 20 through the feed line 410. The LED lighting device 20 includes an LED module 22C, and the LED module 22C connects the LED group 22A and the LED group 22B connected in parallel with opposite polarities between the terminals 23A and 23B. It is included (see FIG. 11).

The operation unit 416 is an operation device for adjusting (adjusting) the luminance (light emission) of the light emitted by the LED illuminating device 20 (adjusting the light) and adjusting the chromaticity (coloring, color temperature). The operation unit 416 includes an operation dial 416A for dimming and an operation dial 416B for dimming. By rotating each of the dials 416A and 416B, the user can adjust the luminance (light emission amount) and chromaticity (color, color temperature) of the LED lighting device 20.

The manipulated variable detector 417 is a signal generator that outputs a signal corresponding to the amount of rotation (rotation angle) of the dial which is the manipulated amount of each of the operation dials 416A, 416B. In the present embodiment, the manipulated variable detecting unit 417 is configured according to the amount of rotation (rotation angle) of the variable resistor 417A and the operation dial 416B whose resistance values vary depending on the amount of rotation (rotation angle) of the operation dial 416A. The variable resistor 417B in which a resistance value fluctuates is included. In the manipulated variable detector 417, a predetermined DC voltage (for example, up to 5 V at no load) generated from the commercial AC power supply in the power supply circuit 412 is applied to the wiring 405. The wiring (signal line) 418, which connects the manipulated variable detector 417 and the control device 420, generates a voltage (maximum 5V) corresponding to the resistance value of the variable resistor 417A. On the other hand, a voltage (maximum 5V) corresponding to the resistance value of the variable resistor 417B is generated in the wiring (signal line) 419 that connects the manipulated variable detector 417 and the control device 420. In this way, the manipulated variable detector 417 generates a signal voltage corresponding to each manipulated value of the manipulation dials 416A, 416B.

In addition, instead of the operation dials 416A and 416B, a slide bar is applicable. When the slide bar is applied, the manipulated variable detector 417 generates a voltage (signal) according to the shift amount instead of the rotation amount. In addition, the manipulated variable detector 417 is configured to output a voltage corresponding to the variable resistance value as a control signal. Instead, a rotary encoder for detecting the rotation amount (rotation angle) of the operation dials 416A and 416B may be provided, and a pulse indicating the rotation amount of the rotary encoder may be input to the control device 420. In this case, the analog-digital converter which converts the voltage mentioned later into a digital value can be abbreviate | omitted.

The control device 420 is a control circuit in which an analog / digital converter (A / D converter), a microcomputer (microcomputer: MP), a register, a timer, a counter, and the like are combined. The microcomputer can apply, for example, a memory-embedded microprocessor operating at an operating frequency (for example, 4 MHz) from a crystal oscillator not shown by the master clock.

The microcomputer loads the operation program recorded in the internal ROM (not shown) into the RAM (not shown), and executes processing according to the program.

The A / D converter outputs a digital value of the voltage generated on the signal line 418, and the digital value is set in a register (not shown). The A / D converter outputs a digital value of the voltage generated in the signal line 419, and the digital value is set in a register (not shown).

The timer and counter included in the control device 420 are driven by the ceramic oscillator 421 oscillating at a desired self-oscillating frequency (for example, 1 MHz), and the wirings for binding the driving logic circuit 431 in the control device 420. From 424 and 425, a complementary pulse is cut out at a preset timing and output. This complementary pulse is set in advance such that the repetition frequency becomes a predetermined frequency, for example.

The microcomputer performs control pulse generation processing in accordance with the digital value (operation amount of the operation dials 416A and 416B) set in each register. The control device 420 supplies a control signal to the drive device 430 via the signal lines 424 and 425 at each repetition frequency t0 (50 Hz in this embodiment) at each cycle T0 (20 msec). do. In this embodiment, as shown to Fig.13 (a), the control apparatus 420 outputs a positive pulse in period T1 which supplies a positive control signal in one cycle (period T0), and supplies a negative control signal. A negative pulse is output in the period T2.

The microcomputer increases and decreases the on time of the pulse in each of the period T1 and the period T2 without changing the ratio of the on time of the government pulse in one cycle in accordance with the change in the operation amount of the operation dial 416A. Emission amount) is controlled. On the other hand, the microcomputer substantially changes the ratio of the periods T1 and T2 in accordance with the variation in the operation amount of the operation dial 416B, and changes the ratio of the on time of the positive pulse and the on time of the negative pulse in one cycle. The chromaticity (color temperature in this embodiment) is controlled.

The driving logic circuit 431 performs on / off operation (switching operation) of the transistors (switching elements) TR1 to TR4 included in the driving circuit 432 in response to pulses (control signals) supplied from the wirings 424 and 425. To control. That is, the control circuit 431 turns off the transistors TR1 to TR4 when there is no pulse input from the wirings 424 and 425. On the other hand, the control circuit 431 turns on the transistors TR1 and TR4 while the positive pulse from the wiring 424 is input, and turns off the transistors TR2 and TR3. For this reason, the direct current supplied from the power supply circuit 412 through the wiring 414 flows to the feed line 401a through the transistor TR1, and is consumed for lighting the LED group 22A. Thereafter, a current flows (grounded) through the feed line 401b and the transistor TR4 to the wiring 415.

On the other hand, the drive logic circuit 431 turns on the transistors TR2 and TR3 while turning off the transistors TR1 and TR4 while the negative pulse from the wiring 425 is input. For this reason, the direct current supplied from the power supply circuit 412 via the wiring 414 flows to the wiring 401b through the transistor TR2, and is consumed for lighting the LED group 22B. Thereafter, a current flows (grounded) through the wiring 401a and the transistor TR3 to the wiring 415.

Therefore, the positive lighting current and negative driving current having the same waveform as the pulse (control signal) output from the control device 420 are alternately supplied to the LED lighting device 20. In other words, an alternating current having different polarities is supplied as the driving current to the LED groups 22A and 22B. The average current supplied for each LED group 22A, 22B depends on the on time of the pulse. That is, the larger the on time of the pulse, the higher the average current value of the drive current supplied to each of the LEDs 22A and 22B in one cycle. On the contrary, the degree that the duty ratio becomes small (the pulse on time decreases) and the average current value becomes small.

Fig. 13A shows the pulse at the duty ratio 1. Therefore, one pulse is output in each of the pulse supply periods T1 and T2 of the government. Fig. 13B shows a state in which the duty ratio is decreased in the periods T1 and T2 by the PWM control of the microcomputer. By changing the duty ratio, a plurality of pulses having a predetermined pulse width are supplied. 13C shows a state in which the duty ratio is lowered than that in FIG. 13B. In this case, the pulse width of the pulse of the government becomes further small.

The example shown to FIG.13 (a)-(c) shows the mode at the time of operating the operation dial 416A for light control so that brightness (light emission amount) may become small. In this way, when the operation dial 416A is operated, the average current decreases as the on time of the pulse decreases by the microcomputer decreasing the duty ratio by PWM control. For this reason, luminance (light emission amount) falls. However, in one cycle (period T1 and period T2), the ratio of the on time of the pulse does not change. Therefore, the luminance (light emission amount) can be increased or decreased without changing the chromaticity (color temperature in the present embodiment) of the LED lighting device 20.

On the other hand, when the operation dial 416B is operated, a pulse state is shown to FIG. 14 (a)-(c). When the operation dial 416B is operated, the microcomputer changes the number of pulses of the government in one cycle (cycle T0) without changing the pulse width at that time. In Fig. 14A, the pulse widths of the negative parts are the same, and the ratio of the ON time of the pulses is 4: 3.

On the other hand, in FIG.14 (b), the ratio of the ON time of a pulse is changed to 3: 4. In addition, in FIG.14 (c), the ratio of the ON time of a pulse is changed into 2: 5. By changing such a ratio, the ratio of the lighting time of LED group 22A, 22B changes in one cycle. For this reason, the chromaticity (color temperature in this embodiment) of the synthetic light emitted by lighting of each of the LED groups 22A and 22B is changed.

The repetition frequency T0 (self oscillation frequency) for outputting the above-mentioned government pulse can be set between 30 Hz and 50 kHz, for example, from the viewpoint of the sensitivity of the human eye, prevention of switching loss, and noise generation. Preferably it is 50Hz-400Hz. Further preferably, 50 or 60 Hz to 120 Hz. The self-oscillating frequency can be determined independently from the commercial power supply frequency, but does not prevent selecting the same frequency as the commercial power supply frequency. In this embodiment, transistors TR1 to TR4 are used as the switching elements, but FETs may be used instead of the transistors.

Integrating circuits 450 and 440 are provided in the control circuit 413 shown in FIG. 12. The integrating circuit 450 feeds back a voltage proportional to the average value of the positive current for driving the LED group 22A to the control device 420, and the integrating circuit 440 provides a negative current for driving the LED group 22B. The voltage proportional to the average value of the feedback to the control device 420. The control device 420 observes the feedback voltages of the integrating circuits 440 and 450 by using an A / D converter, and uses them to generate control signals (pulses).

Hereinafter, an operation example of the dimming device 410 will be described. When the main power switch 411 (FIG. 11) is closed, rectification and voltage conversion operations by the power supply circuit 412 are performed, and DC power is supplied to the control circuit 413.

The microcomputer of the control apparatus 420 starts an initialization operation by a well-known method, loads the operation program recorded in the internal ROM which is not shown in RAM not shown, and performs the process according to a program.

When adjusting the brightness | luminance of the LED illuminating device 20, the following operation and the operation of the light control apparatus 410 are performed, for example. For example, the user (user) turns the operation dial (operation knob) 416A completely to the right, for example, to set the luminance (light emission amount) of the illumination to the maximum. As a result, a DC voltage of up to 5.0 V is generated in the signal line 418. The control device 420 converts the voltage generated in the signal line 418 into a digital signal by the built-in A / D converter, and reads it, and the signal lines 424 and 425 with respect to the driving logic circuit 431 of the driving circuit 430. Give control signal through The driving logic circuit 431 drives the driving circuit (H bridge) 432 in accordance with the control signal. At this time, the driving circuit 432 is driven at 50 Hz, which is a preset self-oscillating frequency. At this time, as shown in Fig. 13A, the positive current flows through the feed line 401a during the time t1, which is the on time of the positive pulse (control signal), and the LED group 22A (LED- Turn on H). On the other hand, during time t2 which is the on time of the negative pulse (control signal), the negative current flows through the feed line 401a to light up the LED group 22B (LED-L).

As a result, an alternating current of approximately 50 Hz flows through the feed line 401, and the LED group 22A and the LED group 22B mounted on the LED lighting device 20 alternately light up. The ratio of the current (individual current) flowing at time t1 and the current (individual current) flowing at time t2 dominates the chromaticity (color temperature in this embodiment) of the synthetic light emitted by the LED groups 22A and 22B. In the state shown in FIG. 13A, since the lighting time of the LED group 22A having a high Kelvin temperature is longer than the lighting time of the LED group 22B, the light emission color of the LED module 22C is slightly blueish white.

The user returns the operation dial (illumination knob) 416A to the left to set the luminance of the illumination to the center value. Then, a DC voltage of about 2.5V is generated in the signal line 418.

The microcomputer of the control device 420 converts and reads the voltage into a digital signal in the built-in A / D converter, controls the driving of the driving device 430, and supplies an alternating current to the LED lighting device 20. . The pulse waveform at this time is in the state shown in Fig. 13B. That is, the ratio of the on time of the positive pulse in the period T1 and the on time of the negative pulse in the period T2 remains unchanged, but the maximum luminance is maintained at the time of being subjected to the modulation of the pulse frequency (about 400 Hz) (duty ratio is lowered). One pulse has a plurality of pulse groups having a pulse width according to the duty ratio. In addition, the pulse width of a positive pulse and the pulse width of a negative pulse are the same. For this reason, since the average current decreases as compared with the maximum luminance, the luminance of the LED group 22A (LED-H) and the LED group 22B (LED-L) is lowered.

Thereafter, the user further returns the operation dial (illumination knob) 416A to the left to set the luminance of illumination to the minimum value. Then, a DC voltage of about 0.5V is generated in the signal line 418.

The microcomputer of the control device 420 converts and reads the voltage value by the A / D converter, and controls the drive device 430 according to the voltage value. That is, as shown in Fig. 13C, the control device 420 further lowers the duty ratio of the negative pulses in the periods T1 and T2. For this reason, the ratio of the ON time of a positive pulse in period T1 and the ON time of a negative pulse in period T2 does not change, and the modulation of about 400 Hz does not change either. However, since the pulse width (duty) of 400 Hz is further reduced, the average current is further reduced from the center luminance. Therefore, the LED group 22A (LED-H) and the LED group 22B (LED-L) all have the darkest luminance.

Next, when adjusting the chromaticity (color temperature in this embodiment) of the LED illuminating device 20, an operation example of the user (user) and an operation example of the dimming device 410 will be described. The current waveform shown in FIG. 13 (b) shows a slightly blueish white color because the average current for the LED group 22A (LED-H) is large because the average current of the LED group 22B (LED-L) is large.

In the state where the current waveform shown in FIG. 13 (b) is supplied to the LED illuminating device 20, the case where the user intends to change the Kelvin temperature to become reddish white will be described. The user rotates the operation dial (toning knob) 416B to the left (counterclockwise). Then, the DC voltage (for example, about 4V) which generate | occur | produces in the signal line 419 falls about 3.0V, for example.

The microcomputer of the control device 420 reads the digital value of the DC voltage of the signal line 419 converted by the A / D converter, and changes the pulse waveform for controlling the drive device 430. For example, the microcomputer of the control device 420 changes the pulse waveform supplied to the drive logic circuit 431 of the drive device 430 from Fig. 13B to Fig. 14A. That is, the microcomputer changes the ratio of the positive current (pulse) which is 5: 2 and the negative current (pulse) in the state of FIG. 13 (b) to 4: 3 as shown to FIG. 14 (a). As a result, the average current supplied to the LED 22A decreases, and the average current supplied to the LED 22B increases. As a result, the light emission color of the LED module 22C, that is, the color temperature, decreases slightly to show a reddish white color. At this time, as shown in Fig. 14A, the ratio of the pulses is changed, but since the total value of the pulses (the total value of the average currents) does not change, the luminance of the LED module 22C does not change.

Thereafter, the user further intends to change to the reddish white with the lowest Kelvin temperature, and rotates the operation dial (chromatic knob) 416B to the left (counterclockwise) to the limit. Then, the DC voltage of the signal line 419 which is about 3.0V drops to about 1.0V.

When the microcomputer of the control device 420 detects the DC voltage of the digitally converted signal line 419, the microcomputer of the control device 420 changes the control signal (pulse) supplied to the driving logic circuit 431. That is, the microcomputer changes the current waveform flowing through the feed line 401a from Fig. 14 (a) to Fig. 14 (b) through Fig. 14 (b) (the ratio of the government current (pulse) is 2: 5). ), A control signal is given to the driving device 430. This further reduces the average current of LED 22 group A (LED-H), while further increasing the average current of LED group 22B (LED-L). As a result, the color temperature of the LED module 22C is markedly lowered, resulting in a white color with strong red color. At this time, the overall brightness of the LED module 22C does not change.

FIG. 15 is a diagram illustrating a modification of the embodiment, and illustrates an equivalent power change in FIG. 13. As shown in Fig. 15A, in the initial state, the current waveform shows the same state as in Fig. 13A.

When the average value (effective value) of the current is lowered with the intention of dimming, even if the current waveform shown in FIG. 15B is applied instead of FIG. 13B, the power per step time is equivalent in both. Similarly, Figs. 15C and 13C are power equivalents. Corresponding to the control shown in FIG. 15, the microcomputer of the control device 420 calculates the on time of the pulse according to the amount of rotation of the operation dial (dimming knob) 416A, and controls the pulse to be on in the meantime. According to such a modification, the switching loss of the drive circuit 432 can be reduced.

Detailed operation will be described below. In this modification, the circuit configuration may be the same as the circuit configuration shown in Fig. 12, but the operation of a program not shown in the microcomputer is different.

Assuming that the state of Fig. 15A is the maximum luminance time, it is assumed that the user has operated the operation dial (dimming knob) 416A so that the luminance of the illumination is the median value. Then, the microcomputer reduces the time (pulse width) t1 and t2 in FIG. 15 (a) by 50%, respectively, in such a state that the ratio is not changed. For this reason, as shown in FIG.15 (b), electric current (pulse) becomes time (pulse width) t1 'and t2' equivalent to 50% of time (pulse width) t1 and t2, respectively. As a result, the average current decreases, and the LED groups 22A and 22B are both slightly light emitted.

Further, when the user operates the operation dial 416A so that the brightness of the illumination is at a minimum value, the microcomputer sets the time (pulse width) t1 'and t2' in FIG. 15 (b) in such a state that the ratio is not changed. 25% is reduced respectively. For this reason, as shown in FIG.15 (c), electric current (pulse) becomes time (pulse width) t1 "and t2" corresponding to 25% of time (pulse width) t1 'and t2', respectively. For this reason, an average electric current falls, and LED group 22A, 22B together becomes remarkably dark light emission.

In the state of Fig. 15A, when the user operates the operation dial (tone knob 416B) intentionally to lower the chromaticity (color temperature in the present embodiment), the microcomputer determines the ratio of time (pulse width) t1, t2. As shown in Fig. 16B, the time t1 is reduced to the time t1 'state, and the time t2 is increased to the time t2' state.

Further, when the user operates the operation dial 416B so that the color temperature is most reduced, the time t1 'further decreases, the time t2' further increases, and the state shown in Fig. 16C is obtained.

In this way, the microcomputer changes one pulse width supplied to the driving logic circuit 431 in accordance with the operation amounts of the operation dials 416A, 416B, so that the luminance (emission amount) and chromaticity of light emitted from the LED module 22C ( Color, color temperature) can be adjusted.

In the above modification, the harmonic components included in the current waveforms are reduced compared to the examples shown in FIGS. 13 and 14, and thus the power loss of the semiconductor which is almost proportional to the switching frequency and the advantage of reducing the radio wave disturbance to the surroundings are reduced. There is an advantage that can be reduced.

According to the first to fifth embodiments, the dimmer converts an alternating current from an alternating current power source such as a commercial power supply into a direct current circuit, and the control device 420 controls the driving device 430, and the alternating current is converted. An alternating current (current current supplied to each cycle T0) by the oscillation frequency is cut off from the direct current, and is supplied as a drive current to a pair of LED groups (LED groups 22A and 22B) connected in anti-parallel. For this reason, the freedom degree of design of a light control apparatus can be raised. In addition, by setting the self-oscillation frequency at a frequency higher than the sensitivity of the human eye, it is possible to prevent the occurrence of flickering of the illumination. It can also contribute to power factor improvement.

In addition, the control device 420 can individually and control the average current to be supplied to the LED groups 22A, 22B, respectively. In addition, brightness can be adjusted by increasing or decreasing each average current, instead of replacing the ratio of average current. In addition, by changing the ratio of average currents to be supplied to the LED groups 22A and 22B, respectively, the color temperature of the light emitted from the LED module 22C can be changed without changing the luminance.

<Light Emitting Module and Package>

Hereinafter, the light emitting module (LED module) and package which are applicable to LED lighting apparatus in each above-mentioned embodiment are demonstrated. 17A is a perspective view of a schematic configuration of a package 701 in a semiconductor light emitting device (hereinafter referred to as a "white LED") 708 constituting a light emitting module (LED module). Fig. 17B is a diagram showing a mounting state of wirings 720A and 720B for supplying power to semiconductor light emitting elements (LED elements, hereinafter referred to as “LED chips”) 703A and 703B provided in the package 701. 18 is a figure which modeled the package 701 (white LED 708) shown to FIG. 17A and FIG. 17B using an electrical symbol. FIG. 19 is a diagram schematically showing a state in which the white LEDs 708 shown in FIG. 18 are connected in series. FIG. 20 is a cross-sectional view when the white LED 708 shown in FIG. 17A is cut at the plane including the wirings 720A and 720B.

As shown in FIG. 17A, the white LED 708 includes a package 701, which includes an annular and conical trapezoidal reflector 710 disposed on the substrate 702. Have The reflector 710 has a function of directing a part of the output light from each of the divided regions 712 described later in the emission direction of the white LED 708, and also fulfills the function of the main body of the package 701. In addition, the upper surface side of the cone trapezoidal shape of the reflector 710 becomes the light emission direction by the white LED 708, and forms the opening part 713. FIG. On the other hand, the lower surface side of the conical trapezoidal shape of the reflector 710 has a substrate 702 disposed therein, which will be described later, but the wiring is laid for supplying power to the LED chip (the wiring is not shown in Fig. 17A). .

The partition 711 is provided perpendicularly to the substrate 702 while the inner space of the annular reflector 710 is divided into two regions evenly as shown in FIGS. 17A and 20. By the previous partition 711, the two divided regions 712A and 712B are determined in the reflector 710, and the opening of the divided region 712A is defined by the right half of the opening 713 of the reflector 710. The opening of the divided portion 712B occupies the left half of the opening 713 of the reflector 710. In the present specification, the opening of the divided region 712A is called the divided opening 713A, and the opening of the divided region 712B is called the divided opening 713B. That is, the opening 713 is divided into the divided openings 713A and 713B by the partition 711.

However, the shape of the divided regions 712A and 712B in the package 701 is not limited to the structure in which the vertical wall is provided as the partition 711. The divided regions 712A and 712B may be grooves each having a shape of a cone, a pyramid, a hemisphere, or the like. In addition, neither the shape nor the content of the divided regions 712A and 712B are the same.

In addition, although the package 701 shown in FIG. 17A is a structure including division area parts 712A and 712B in an integrated member, it is not essential to use such a package 701. It is possible to provide two structures (packages) which have a structure as a divided area part, and to function one as the divided area part 712B and the other as the divided area part 712B.

Four LED chips 703A and 703B are provided in each of the divided regions 712A and 712B shown in FIG. 17A. These LED chips 703A and 703B (referred to as LED chips 703 when referring to these LED chips collectively) are respectively connected to paired wiring 720A and 720B (sometimes referred to collectively as wiring 720). Then, light is emitted by receiving electric power. In addition, as shown in FIG. 17B, four LED chips 703A are mounted on the wiring 720A, and the wiring 720B is connected to the wiring 720 in each divided region. Four LED chips 703B are mounted on it. In each divided area, four LED chips 703 are connected in parallel in the forward direction with respect to the corresponding wiring.

Examples of the LED chip include an ultraviolet LED chip emitting light of an ultraviolet wavelength (300-400 nm) and a purple LED chip emitting light (400-440 nm), and a blue LED chip emitting blue light (440-480 nm). Can be applied. The number of LED chips 703 provided in each of the divided regions 712A and 712B is 1 to 10, for example. What is necessary is just to determine the number of LED chips 703 suitably according to chip size and required brightness. Moreover, the kind of LED chip 703 provided in each division area part 712A, 712B may be the same kind, or this kind may be sufficient as it. As this kind of combination, a combination of an ultraviolet or violet LED and a blue LED is considered.

18 shows the mounting state of such LED chips 703A and 703B. That is, in Fig. 17B, the wirings 720A and 720B located at the upper side and the lower side, respectively, are connected so that four parallel-connected LED chips 703A and four parallel-connected LED chips 703B are reversed in polarity. Is connected in parallel. Moreover, the wiring 720C and the wiring 720D are shown from each of the connected wiring 720A and the wiring 720B, and the white LED 708 (package 701) has a structure which has two terminals.

A diode D1 for preventing backflow is inserted between the cathode of the LED chip 703A and the wiring 720D, and a diode D2 for preventing backflow between the cathode of the LED chip 703B and the wiring 720C. Is inserted. For this reason, when the electric current which flows from the wiring 720C to the wiring 720D flows, only each LED chip 703A turns on. On the other hand, when the electric current which flows from the wiring 720D to the wiring 720C flows, only each LED chip 703B lights. Thus, the white LED 708 can be driven by a current that changes direction in time, that is, an alternating current.

The white LEDs 708 (package 701) shown in FIG. 18 are serially connected in a predetermined number (2 in FIG. 19) as shown in FIG. For this reason, it corresponds to LED chip 703A (LED group 22A; 1st LED (group)) typically shown by FIG. 17A etc., and LED chip 703B; LED group 22B; 2nd LED (group). ) Can obtain an LED module (light emitting module) connected in parallel.

Here, mounting of the LED chip 703 to the board | substrate 702 is demonstrated based on FIG. The substrate 702 is a base for holding a white LED 708 including an LED chip 703 and includes a metal base member 702A, an insulating layer 702D formed on the metal base member 702A, and insulation It has double wirings 720c and 720d formed on the layer 702D. The LED chip 703 has a pair of p-electrodes and n-electrodes on opposite and bottom surfaces thereof, and the LED chip is formed on the upper surface of the double wiring 720c through an AuSn eutectic solder 705. The electrode on the bottom side of 703 is joined. The electrode on the upper surface side of the LED chip 703 is connected to the other double wiring 720d by a metal wire 706. As such paired wirings 720c and 720d, a pair of wirings 720A or 720B shown in FIG. 17B are formed, and power is supplied to the four LED chips 703 in each divided region.

In addition, the electrical connection of the pair of double wiring 720c, 720d of the LED chip 703 and the board | substrate 702 is not limited to the form shown in FIG. It can be performed by an appropriate method depending on the arrangement. For example, when a pair of electrodes is provided only on one surface of the LED chip 703, the LED chip 703 is provided with the surface on which the electrode is provided upward, and each pair of electrodes and each pair of wirings 720c and 720d are provided. For example, by connecting the wires 706 to each of the wires 706, the double wirings 720c and 720d and the LED chip 703 can be electrically connected. In the case where the LED chip 703 is a flip chip (face down), the electrodes and the double wirings 720c and 720d of the LED chip 703 can be electrically connected by joining with iron bumps or solder.

Here, the LED chip 703 excites fluorescent parts 714A and 714B (also referred to collectively as fluorescent part 714) which will be described later. Especially, it is preferable that it is a GaN type LED element using a GaN type compound semiconductor. This is because ultraviolet to blue light is emitted because the light emission output and the external quantum efficiency are remarkably large, and by combining with a phosphor described later, very bright light can be obtained at very low power. In GaN type LED elements, it is preferable to have a light emitting layer containing In, for example, an AlxGayInzN light emitting layer or an InxGayN light emitting layer. As is well known, in the case where the emission wavelength is purple to blue, when the light emitting layer is a multi-quantum well structure having an InxGayN well layer, and the well layer is a double hetero structure sandwiched between the clad layers, the luminous efficiency is particularly high. Increases.

As shown in FIG. 21, on the board | substrate 707, the fluorescent part containing the several or single fluorescent substance which absorbs a part of the light emitted from this LED chip 703, and emits light of a different wavelength, and the translucent material which seals the said fluorescent substance. 714 covers the LED chip 703 and is provided. In addition, although the description of the reflector 710 is abbreviate | omitted in FIG. 21, such a form can also be one form of the white LED comprised from a package. Some of the light emitted from the LED chip 703 is absorbed in part or all as excitation light by the light emitting material (phosphor) in the fluorescent part 714. More specifically, the fluorescent part of the white LED 8 will be described based on FIG. 20. In the divided region part 712A, the fluorescent part 714A covers the LED chip 703A, and the fluorescent part 714A is divided. It is exposed in the opening 713A. As for the divided region 712B, the fluorescent portion 714B covers the LED chip 703B, and the fluorescent portion 714B is exposed through the divided opening 713B. Therefore, the output light from each fluorescent part 714A, 714B is radiate | emitted outside from each division opening part.

duｖ

0.02를 채우도록, LED 칩(703)과 형광체의 조합을 선택한다. 또한, 본 실시 형태에 있어서 흑체 복사 궤적으로부터의 편차 duｖ는 JIS Z8725(광원의 분포 온도 및 색온도ㆍ상관 색온도의 측정 방법)의 5.4항의 비고 정의에 따른다. 단, 흑체 복사 궤적은 절대적인 기준은 아니다. 인공적인 규격에 따른 발광색(인위적으로 정해진 기준 광으로부터의 편차로 규격화된 발광색)이 요구되는 경우가 있다. The white LED 708 is intended for outputting white light, and in particular, the emission color of the white LED 708 is a deviation from the blackbody radiation locus in the uｖ chromaticity diagram of the UCS (u, ｖ) colorimetric system (CIE1960). To be as small as possible, preferably -0.02

duｖ

The combination of the LED chip 703 and the phosphor is selected to fill 0.02. In addition, in this embodiment, the deviation du 'from the black body radiation trajectory follows the definition of the remarks of clause 5.4 of JIS Z8725 (Method for measuring the distribution temperature of the light source and the color temperature and the correlated color temperature). However, the blackbody radiation trajectory is not an absolute criterion. In some cases, a light emission color according to an artificial standard (light emission color normalized by deviation from an artificially determined reference light) may be required.

When the light emission wavelength of the LED chip 703 is ultraviolet or purple, white light is obtained by the fluorescent unit 714 generating light having three primary colors of RGB or complementary colors such as BY and RG. When the light emission wavelength of the LED chip 703 is blue, light of Y or RG is generated by the fluorescent part 714 to obtain white light by the mixed color with the light emission of the LED chip 703.

[Sixth Embodiment]

EMBODIMENT OF THE INVENTION Hereinafter, 6th Embodiment of this invention is described. In the sixth embodiment, for example, dimming control (brightness adjustment) and color tone control (using a wall dimming device (dimmer)) and utilizing existing two-wire wiring, without performing wiring replacement work, are performed. The LED lighting system which can realize both of color temperature adjustment) is demonstrated.

It is a figure which shows the structural example of the LED lighting system which concerns on 6th Embodiment. 22 shows a pair of commercial power buses 1010 supplied with commercial power (for example, AC 100V, 50 Hz), a pair of feeders 1020 for illuminators, and a lead line 1030 for a pair of dimmers. Is shown. Such wirings 1010, 1020, and 1030 are generally laid in an electrical wiring installation space such as a wall or ceiling of a building.

The dimming device 1040 having a pair of two terminals T101 and T102 is connected to the lead wire 1030. On the other hand, an LED lighting device (also referred to as an LED lighting device and an LED light emitting device, also called an LED bulb) having a pair of two terminals is connected to the feed line 1020. In FIG. 22, an LED lighting device 1050 is connected instead of an incandescent light bulb having a pair of terminals T103 and T104. The dimming device 1040 is installed, for example, on a wall of a building. The LED lighting device 1050 is installed by a fixing hole provided in a wall or a ceiling, and is then electrically connected to the feed line 1020 through a socket or a connector.

The dimming device 1040 includes terminals T101 and T102, a main power switch 1041, a triac 1042, a trigger diode 1043, and a time constant circuit 1044. The terminals T101 and T102 are connected to the lead wire 1030 in order to supply the electric power from the bus bar 10 into the light modulation apparatus 1040. The main power switch 1041 is a main power switch for turning on and off the LED lighting fixture 1050.

The triac 1042 functions as a conduction control part for controlling the alternating current supplied to the LED lighting device 50. The triac 1042 is turned on (corresponds to) the trigger signal from the trigger diode 1043 in the half cycle of the government in one cycle of the alternating current of the commercial power supply, and the terminal T102 until the corresponding half cycle ends. Supply positive or negative voltage (current) continuously. The trigger diode 1043 supplies a trigger signal for the triac 1042 to call to the triac 1042.

The time constant circuit 1044 controls the timing at which the trigger diode 1043 supplies a trigger signal to the triac 1042. The time constant circuit 1044 has a resistor 1044a, a variable resistor 1044b, and a capacitor (capacitor) 1044c and is connected to the trigger diode 1043. The resistance value of the variable resistor 1044b varies depending on the operation amount of the operation unit (user interface) 1047. The operation unit 1047 is used to manipulate the conduction time (cursive phase angle) of the triac 1042.

The resistor 1044a, the variable resistor 1044b, and the capacitor 1044c constitute a CR time constant circuit that occupies the applied voltage to the trigger diode 1043 for the positive half cycle (first half cycle) of alternating current, and this resistance value and capacitance The trigger diode 1043 is turned on in accordance with the time constant determined by the value.

22 shows a time constant circuit for firing the triacs 1042 in a positive half cycle, the dimming device 1040 also includes a time constant circuit for firing the triacs 1042 in a negative half cycle. have. In addition, the dimming device 1040 may include a hysteresis removal circuit that removes residual charge of the capacitor 1044c and removes hysteresis in a half cycle of the government.

FIG. 23 is a diagram showing a relationship between an AC waveform of a commercial power source applied to the light control device 1040 and an AC voltage supplied to the LED lighting device 1050 by the firing of the triac 1042. As shown in FIG. 23A, an alternating voltage of a sine curve from a commercial power supply is applied to the light modulation apparatus 1040. In the positive half cycle, at the same time as the start of voltage application, positive charge is started on the capacitor 1044c of the time constant circuit 1044 so that the charge charged in the capacitor 1044c becomes a predetermined amount. 1043 supplies a trigger signal to the triac 1042. Triac 1042 then fires at a predetermined angle θ in a positive half cycle, and starts supplying a positive current to LED lighting fixture 1050. The current supply continues until the end of the half cycle. The same operation is performed also in the negative half cycle.

In this manner, in each half cycle of the government, the triac 1042 call each other at the timing corresponding to the time constant of the time constant circuit 1044, and supply AC power to the LED lighting fixture 1050. That is, the triac 1042 conducts an alternating current from a commercial power supply at the firing time.

The time constant changes with the resistance value of the variable resistor 1044b. In other words, the smaller the resistance value of the variable resistor 1044b is, the smaller the time constant is, and the timing at which the triac 1042 calls it is advanced (see FIGS. 23B and 23C). Thus, by changing the resistance value of the variable resistor 1044b by operation of the operation part 1047, the firing phase angle (conduction time) of the triac 1042 can be made variable.

In Fig. 22, the LED luminaire 50 includes a firing phase angle detection circuit 1090 and a microcomputer (microcomputer) 1100 functioning as an analysis section, and a driving section (driving circuit; 1080) for the LED module 1060. It is provided. The driving unit 1080 includes an LED module 1060 that is a driving target. The LED module 1060 includes an LED group 1060a and an LED group 1060b arranged in parallel in the forward direction. Each of the LED group 1060a and the LED group 1060b consists of a plurality of LED elements connected in series.

The firing phase angle detection circuit 1090 outputs from the rectifying circuit 1091 and the rectifying circuit 1091 which converts the alternating current supplied by direct current by control of the firing phase angle of the triac 1042 of the light control apparatus 1040, and the direct current. And a constant voltage source 1092 for generating a DC voltage for operation of the microcomputer 1100 from the direct current voltage, and an angle detection circuit 1093 for detecting the firing phase angle of the triac 1042.

The microcomputer 1100 includes a memory (storage device) 1101, a mode determination unit 1102 as a selection means, a brightness adjustment unit 1103 as a brightness control unit, and a color temperature adjustment unit 1104 as a color temperature control unit. The memory 1101 stores a program executed by a processor (CPU (central processing unit)) included in the microcomputer 1100 or data used in executing the program. The memory 1101 also has a recording area for recording the history of the conduction time obtained from the firing phase angle.

The mode determining unit 1102 refers to the history of the conduction time, thereby adjusting the control mode of the LED module 1060 to the dimming mode for adjusting the luminance (light emission amount) of the LED module 1060 and the chromaticity of the LED module 1060 ( Toggle between color tone mode to adjust color temperature).

That is, the mode determination unit 1102 selects the dimming mode as the initial setting when the main power switch 1041 is turned on. The mode determining unit 1102 receives the firing phase angle for each cycle from the angle detection circuit 1093 and calculates the conduction time in the half cycle of the triac 1042 from the firing phase angle. For example, the conduction time is obtained as the difference C between the start point A of the firing point of the triac 1042 and the end point B of the half cycle (voltage 0).

The time near a step angle (for example, 1 degree) in half cycle can be calculated | required from the frequency of alternating current (50 Hz: 1 cycle 20 ms in embodiment). That is, the conduction time can be calculated by (180 [degree]-firing angle [degree]) x (time per 1 deg. = About 0.056 [ms]).

The mode determining unit 1102, in the dimming mode, gives the conduction time to the brightness adjusting unit 1103 and writes it to the memory 1101. For this reason, the history of the conduction time is stored in each memory 1101.

Each time the mode determining unit 1102 calculates (measures) the conduction time of one cycle, the mode determining unit 1102 takes a difference from the conduction time last recorded in the memory 1101. If the difference is zero, the mode determining unit 1102 starts counting by a timer. If the time when the difference is zero (time without change in conduction time) exceeds a predetermined time, the mode determining unit 1102 switches the control mode to the toning mode (selects the toning mode). On the other hand, when the difference is detected before the time when the difference is zero exceeds the predetermined time, the mode determination unit 1102 ends the timekeeping by the timer, and holds the selection of the dimming mode.

In the dimming mode, the mode determining unit 1102 measures the conduction time for each cycle in the same manner as the dimming mode, records it in the memory 1101, and calculates the difference in the conduction time. However, in the color tone mode, the conduction time for each cycle is given to the color temperature adjusting unit 1104. As in the dimming mode, the mode determining unit 1102 starts the timer to measure the time when the difference in the conduction time is 0 when the difference in the conduction time becomes zero. If the time when the difference in conduction time is zero exceeds a predetermined time, the mode selector 1102 switches the control mode back to the dimming mode (selecting the dimming mode). First of all, when the difference is detected before the time when the difference is zero exceeds a predetermined time, the mode determining unit 1102 ends the timekeeping by the timer and holds the selection of the color tone mode.

In this way, the mode determination unit 1102 monitors the conduction time, and switches the control mode on the condition that the time without change in the conduction time exceeds a predetermined time. In addition, the mode determining unit 1102 gives the conduction time to one of the brightness adjusting unit 1103 and the color temperature adjusting unit 1104 according to the mode being selected. In addition, in the above description, the mode determining unit 1102 is configured to supply the conduction time for each cycle to the brightness adjusting unit 1103 or the color temperature adjusting unit 1104. In contrast, the mode determining unit 1102 may supply the conduction time once to a plurality of cycles as necessary.

The luminance adjusting unit 1103 as the luminance control unit is a constant current as the dimming means included in the driving circuit 1080 so that the LED module 1060 emits light at a luminance according to the conduction time (cursive phase angle) supplied from the mode determination unit 1102. Control circuit 1081. For example, the brightness adjusting unit 1103 has a map showing the correlation between the conduction time and the drive current, obtains the drive current according to the conduction time from the map, and controls the constant current circuit 1081 so that such drive current is supplied.

The correlation between the conduction time shown on the map and the drive current can be arbitrarily set, and the length of the conduction time and the magnitude of the drive current may be in proportion. Alternatively, the relationship between the length of the conduction time and the drive current may be nonlinear. For example, the drive current may be increased stepwise according to the length of the conduction time. The point is that the drive current value may increase when the user operates the operation unit 1047 for raising the brightness, and the drive current value may be lowered when the user operates the operation unit 1047 for lowering the brightness. Such increase or decrease of the drive current may not be proportional to the conduction time (cursive phase angle).

The constant current circuit 1081 is an LED group 1060a constituting the LED module 1060 with a predetermined drive current value for the conduction time (curve phase angle) under the control by the brightness adjusting unit 1103; the first LED (group )), Driving current is supplied to each of the LED group 1060b (the second LED (group)). The driving current supplied to the LED module 1060 is the sum of the driving current I _lowk supplied to the LED group _1060a and the driving current I _hik supplied to the LED group 1060b. By increasing or decreasing the total value, the constant current circuit 1081 increases or decreases the average current value of the drive current supplied to the LED groups 1060a and 1060b to raise or lower the brightness (light emission amount) of the LED module 1060.

The color temperature adjusting unit 1104 as the color temperature control unit is a balance circuit 1082 as the toning means included in the driving circuit 1080 such that the LED module 1060 emits light at a color temperature according to the conduction period (cursive phase angle) in the toning mode. To control. The balance circuit 1082 includes a pulse width modulation (PWM) circuit and includes a drive current (average current) I _lowk supplied to the LED group _1060a and a drive current (average current) I supplied to the LED group 1060b. Adjust _hik 's rain. Here, the color temperature adjusting unit 1104, for example, conduction has a map or a table indicating the correlation between the time and the drive current ratio, and the conduction ratio of the predetermined drive current according to the time of the driving current I _lowk with and driving current I _hik The balance circuit 1082 is controlled to be supplied.

The mode determining unit 1102, the luminance adjusting unit 1103, and the color temperature adjusting unit 1104 can be configured as a function realized by a processor included in the microcomputer 1100 executing a program.

In addition, although the conduction time is calculated from the firing phase angle in the above description, it is not essential to obtain the conduction time and record the history of the conduction time. That is, the history of the firing phase angle may be recorded instead of the conduction time, and driving control of the LED module 1060 (LED groups 1060a and 1060b) may be performed by the total value or ratio of the driving currents according to the firing phase angle. .

In the sixth embodiment, the LED module 1060 is a light emitting diode group fabricated on a sapphire substrate, for example, and a set of LED groups in which a plurality (for example, 20) of LED elements are connected in series, respectively. 1060a and the LED group 1060b are arranged in parallel in the same direction.

Each of the LED elements included in each of the LED groups 1060a and 1060b has a light emission wavelength of 410 nm, and a terminal voltage at a forward current of 3.5 V and a direct current of 70 V when 20 LED elements are connected in series. Generate the maximum amount of light.

Each LED element constituting the LED group 1060a is filled with a phosphor that emits about 3000 ° K of white light when qualified with (excitation) light having a light emission wavelength of 410 nm. On the other hand, in each LED element constituting the LED group 1060b, a phosphor emitting white light of about 5000 DEG K is embedded when qualified with (excitation) light having a light emission wavelength of 410 nm. Therefore, the white light irradiated by the light emission of the LED group 1060a and the white light irradiated by the light emission of the LED group 66b have different color temperatures.

In addition, the number of LED elements which comprise LED group 1060a, 1060b can be changed suitably, and one LED element may be sufficient. In addition, the LED groups 1060a and 1060b may emit light with different chromaticities (colors and color temperatures), and the chromaticities that the LED groups 1060a and 1060b can extract can be appropriately selected. In addition, the LED module 1060 may be a combination of LED groups emitting different colors, not a combination of LED groups emitting white light of different color temperatures. Other color combinations may be applied to the desired combination, for example green and blue, yellow and red. Such LED lighting fixtures are considered to be used as neon signs.

Hereinafter, the operation of the operation unit 1047 and the brightness adjustment (dimming) and the color temperature adjustment (color tone) of the LED module 1060 will be described in detail. In 6th Embodiment, the operation part 1047 of the light control apparatus 1040 has a dial-type handle (dial). First of all, the operation unit 1047 may have a slide bar instead of the dial knob.

In the sixth embodiment, when adjusting the luminance (light emission amount) of the LED module 1060, the knob of the operation unit 1047 is rotated left to brighten and the right to darken. However, such a setting is a setting for convenience of description. That is, in the light control apparatus generally used in the present, when the rotary dial is rotated clockwise to the right, the conduction time is increased in the alternating current cycle (for example, from Fig. 3 (a) to Fig. 3 (b)). At this time, when the illuminator connected to the dimming device is a resistive constant load such as an incandescent bulb, the power consumption is increased and the luminance of the incandescent bulb is increased.

In addition, in the sixth embodiment, the rotation angle position information (manipulation amount) of the operation unit 1047 (dial) does not control the increase or decrease of the drive current conduction time for the LED module 1060, but inputs "user's intention information". It is used for For this reason, the operation amount of the operation part 1047 is not directly related to the power consumption increase or decrease of the load.

In the sixth embodiment, the power consumption of the LED module 1060 is controlled on the load side independently of the firing phase angle θ of the triac 1042, unlike the incandescent light bulb load which can be approximated with a pure resistor. It is determined by the judgment of the circuit (microcomputer 1100).

23, the drive control of the LED module 1060 in the sixth embodiment using the triac 1042 will be described. In the sixth embodiment, the luminance adjusting unit 1103 incorporated in the LED lighting fixture 1050 is irrelevant to the length and duration (cursive phase angle) of the conduction time of the triac 1042 shown in FIGS. 23A to 23C. A constant current value to be supplied to the LED module 1060 is determined. Therefore, the LED module 1060 does not necessarily consume power proportional to the instantaneous value of the AC voltage waveform.

However, as shown in Fig. 23A, when the firing timing (ignition phase angle) of the IGBT is relatively slow (the conduction time is short) and the instantaneous value of the voltage waveform is low, the power required for the LED module 1060 to be turned on. Is stored in the capacitor 1084 (power storage unit), and then the supply of the drive current to the LED module 1060 is continuously performed.

For example, in the example shown in Fig. 23A, the conduction period of the IGBT is a 30 ° period from the firing phase angle θ = 150 ° to the phase angle θ = 180 ° in the second half of the positive half cycle. The instantaneous value of the commercial sine wave alternating current (100V) of Japan is 70.7V at a firing phase angle of 150 degree, and is enough for lighting of LED element (operating voltage: 24-30V).

However, the instantaneous voltage of the sinusoidal alternating current decreases rapidly from 150 ° to 180 degrees at the firing phase angle. Therefore, as the driving circuit power supply of the LED element constituting the LED module 1060, the phase angle of supplying 70.7V from 150 ° to the phase angle (approximately 168 °) of supplying 35V, which is about 1/2 of 70.7V, is supplied. It selects as a use range which obtains stable operation | movement. By charging the large-capacity capacitor (capacitor 1084) in such a period of 18 DEG, the driving circuit 1080 can generate a power source for stable and continuous LED.

The charging current of the capacitor 1084 required in the above example charges the power consumed in the AC half cycle 180 ° period within the 18 ° period. For this reason, the charging current becomes about 10 times the normal consumption current. For example, for an LED illuminator that consumes 30 watts, the time average is 100 Vrms (rms is the effective value of AC) and 0.3 Arms, but the average current from phase angle 150 ° to phase angle 168 ° is 3 times that 10. It is estimated to be about [A]. This value is the allowable current value. However, in the phase 90 degrees +/- 5 degrees with instantaneous voltage 100V or more, charging current is set to about 0.3A.

By configuring the power supply of the LED module 1060 as described above, it is possible to determine the LED drive current independently of the firing phase angle of the triac 1042. As a result, the brightness of the LED module 1060 can be controlled independently from the conduction angle of the triac 1042 based on the intention of the user.

A conventional dimmer for a heat generating bulb having a dial and a triac 1042 as the operation unit 1047 can be applied to the dimmer 1040 shown in FIG. 22. According to the rotation amount (operation amount) of the knob of the operation part 1047, the firing phase angle (theta) (refer FIG. 3) of the triac 1042 can be adjusted to any value of 0 degrees-180 degrees.

In the sixth embodiment, the following definition is made so that the numerical value of the position angle of the operation unit (dial) 1047 of the dimming device 1040 and the numerical value of the firing phase angle during the alternating cycle coincide.

That is, the dial can be rotated 90 degrees left and right about the position at 12 o'clock. In addition, in the clockwise rotation direction, the position at the three o'clock position, which is the end point of rotation of the dial, is referred to as "angular position 180 degrees", and is defined as the firing phase angle of 180 degrees and usually the minimum power consumption. In addition, in the counterclockwise rotation direction, the "position at 9 o'clock", which is the end point of the rotation of the dial, is referred to as "angular position 0 degrees", and is defined as a maximum firing phase angle of 0 degrees. In addition, in the following description, the operation | movement which adjusts the brightness | luminance (light emission amount) of the LED module 1060 is described as "dimming", and the operation | movement which adjusts the color temperature of the LED module 1060 is "coloring".

An operation example will be described below when dimming and dimming the LED module 1060. 24 is an explanatory diagram of waveforms such as an AC voltage and a drive current during dimming. 25 is an explanatory diagram of waveforms such as an AC voltage and a drive current during color matching.

The LED module 1060 lights up when the user closes (turns on) the main power switch 1041 (Fig. 22). The luminance and color temperature of the LED module 1060 are negative when the main power is turned on. Above all, for example, the LED module 1060 may be configured to turn on at a predetermined brightness and color temperature by the initial setting of the microcomputer 1100.

The user intends to change the luminance to a desired value as the first step, and rotates the operation portion 1047 (dial) left and right. Look at the light from the LED module 1060 and rotate the dial while checking the brightness. For example, if the user sets the dial at the position at 11 o'clock, the call phase angle is fixed at 60 ° as shown in Fig. 24A. In this step, the LED module 1060 lights up with a brightness slightly brighter than the middle of the adjustable luminance range. When the user is satisfied with this luminance, the user releases the dial as a new dial operation is not necessary. This operation is interpreted by the microcomputer 1100 described later as a pseudo display of the end of the first step.

In the first step, the microcomputer 1100 executes the dimming operation program from the main power supply until the user releases the hand from the operation unit 1047, and performs the operation in the first step. In this embodiment, as the initial state of the microcomputer 1100 by the main power supply, the microcomputer 1100 performs an operation in accordance with the dimming operation program. That is, the microcomputer 1100 operates in the dimming mode.

By executing the dimming operation program, the microcomputer 1100 measures the rotational position of the dial, that is, the firing phase angle (conduction time) of the triac 1042 at every hour. The microcomputer 1100 controls the constant current circuit 1091 according to the measured firing phase angle (conduction time), so that the driving current I _lowk and the LED group _1060b supplied to the LED group 1060a constituting the LED module 1060. ), The total value (I _lowk + I _hik ) of the driving current I _hik supplied to is increased or decreased. As a result, the brightness of the LED module 1060 is updated to the desired value. The user can adjust brightness | luminance to desired brightness by adjusting the rotation angle position of the dial of the operation part 1047 every time, observing the brightness of the LED module 1060.

Thereafter, as described above, when the user releases his hand from the operation unit 1047, the state where the firing phase angle (conduction time) does not change continues for a predetermined time (for example, 5 seconds), the microcomputer ( 1100 ends execution of the dimming operation program and starts execution of the dimming operation program. That is, the control mode is switched to the color tone mode.

As a second step, assume that the user further decides to change the color temperature to the desired value. For example, within a first stop time within 10 seconds of 5 seconds after the hand is released from the control panel 1047 in the first step, the user rotates the control panel 1047 (dial) from the 11 o'clock position to the left and right again. Let's do it. The user performs the dial operation while looking at the color temperature of the LED module 1060, and when the desired color temperature is displayed, the user releases the hand from the operation unit 1047 (dial) again. For example, suppose the user has released his hand at the position at 13:00. In this case, as shown to (b) of FIG. 23, the firing phase angle of alternating current is fixed at 120 degrees.

At the time of executing the toning operation program, that is, in the toning mode, the microcomputer 1100 does not change the brightness of the LED module 1060, that is, constantly holds the sum value I _lowk + I _hik of the LED driving current. With this, the _ratio of the value of the drive current I _{lowk to} the value of the drive current I _hik is changed. As a result, the color temperature of the LED module 1060 changes. When a time when the dial is not operated, that is, a time during which the firing phase angle (conduction time) does not change, the microcomputer 1100 starts the timer counting. If a change in operation (conduction time) is not detected before a predetermined time (for example, 5 seconds) has elapsed, the control operation is _{performed in} a state where the ratio of driving currents I _lowk and I _hik is fixed as the user's toning operation is finished. Return the mode to dimming mode. On the other hand, when the operation is resumed, i.e., when the change in the conduction time is detected before the timer counts the predetermined time, the microcomputer 1100 ends the counting by the timer and maintains the toning mode.

In addition, the microcomputer 1100 can continue counting the timer in the dimming mode when the timer counts a predetermined time (5 seconds) and switches the control mode from the dimming mode to the dimming mode. When a predetermined time has elapsed since the mode switching, for example, when the timer has timed 10 seconds from the start of the clock, it is determined that the user has no intention of toning. In this case, the microcomputer 1100 switches the control mode to the dimming mode while the ratio of the values of the driving currents I _lowk and I _hik is fixed at the time of dimming mode switching.

The LED lighting fixture 1050 (LED module 1060), which is a load of the dimming device 1040, which is a triac dimmer, operates according to the above-described operation example. For this reason, the rule which a user should learn beforehand at the time of using an LED lighting system using the light control device 1040 and the LED lighting fixture 1050 is the following simple rule. That is, as long as the operation of the operation unit 1047 is continued at intervals of 5 seconds or less, the current control mode (the other side of the dimming or dimming mode) continues, and the control mode is switched when the dial operation is paused for 5 seconds or more.

The above 5 seconds (d) is a value that can be changed according to the user's social notion, age group, social class and the like. That is, it is a numerical value which can be set according to the taste of the market. In the experiment conducted by the applicant of Soowon, knowledge was obtained that 4 seconds ± 2 seconds (2 to 6 seconds) was a range in which the user felt convenience. The predetermined time without a change in the firing phase angle (conduction time) can be appropriately set, and a user interface for changing the predetermined time set in the microcomputer 1100 may be provided. Moreover, in the said operation example, the case where the predetermined time which triggers mode switching in both dimming and dimming mode was the same 5 second was demonstrated. However, in the dimming mode and the dimming mode, the length of the predetermined time may be different.

In the operation example of the above-described color tone mode, the purpose of changing the color temperature while holding the luminance constant by the microcomputer 1100 has been described. The operation in this color tone mode will be described in detail below.

24A and 24B show the relationship between the conduction voltage of the triac 1042 (light control device 1040) and the drive current of the LED module 1060. The waveform shown in FIG. 24B is a current waveform when the illuminator is a simple resistive load (for example, an incandescent bulb). 24 (a) and (b), it is well known that the voltage waveform and the current waveform are similar.

On the other hand, Fig. 24C shows a current waveform in the case of the constant current drive load as in the present embodiment. It can be seen that the current waveform of FIG. 24C is completely different from the AC voltage waveform shown in FIG. 24A. That is, for the LED luminaire 1050 incorporating a constant current drive circuit (constant current circuit 1081), a substantially constant drive current is loaded from immediately after the firing to just before the AC phase angle of 180 ° regardless of the time variation of the voltage waveform. (LED module 1060).

In addition, as shown in the charging waveform (triangle wave) shown in FIG. 24 (d), a large charging current immediately charges the capacitor 1084 and holds a DC voltage, immediately after the firing, thereby driving waveform shown in FIG. 24E. As described above, it is possible to design the rectifier circuit 1083 such that the drive current supply to the LED module 1060 serving as the load is continued even after the end of the alternating current phase 180 degrees (after the end of the half cycle). 24C, 24D, and 24E show current waveforms after full-wave rectification by the rectifier circuit 1083.

As described above, by allowing a relatively large current to charge the capacitor 1084 immediately after the firing of the triac 1042 to be supplied from the rectifier circuit 1083, regardless of the dial position (manipulation amount) of the dimming device 1040, The holding of the DC voltage as shown in Fig. 24E can be achieved. Therefore, the LED module 1060 can be driven with a desired current value.

25, the relationship between the operation of the light control device 1040 and the load current consumed by the LED module 1060 will be described in addition to the operation procedure from the 11 o'clock position to the 13 o'clock position performed by the user described above.

When the user turns the operation part 1047 (dial) of the light control device 1040 clockwise, the user transitions from the firing phase angle 60 ° shown in Fig. 24A to the firing phase angle 120 ° shown in Fig. 25A, The conduction time is reduced. At this time, if the luminaire is a simple resistive load such as an incandescent bulb, a current of a voltage proportional waveform as shown in Fig. 25 (b) flows. In the present embodiment, however, the current that charges the capacitor 1084 flows as shown in FIG. 25 (d), which is almost twice the current shown in FIG. 24 (d) immediately after the firing. The low capacitor 1084 is charged. This is because the capacitor 1084 has a low voltage due to the LED consumption current because the AC non-conduction time is long, and the potential difference between the AC power supply side and the capacitor 1084 side is enlarged.

When the capacitor 1084 has a large enough capacity, even if the firing phase angle becomes 120 DEG and the conduction time decreases, as shown in Fig. 25E, almost DC load current can be continuously supplied to the LED module 1060. Can be. 25C, 25D, and 25E show the DC current waveforms after full-wave rectification by the rectifier circuit 1083.

In addition, in the case of an incandescent bulb compatible LED lighting device which is difficult to use a large capacity capacitor 1084, an intermittent direct current is supplied to the LED module 1060 as shown in FIG. 25 (c). First of all, for the human eye, when it is indistinguishable from the lighting by continuous DC current supply as shown in Fig. 25 (e), the supply of DC current as shown in Fig. 25 (c) is also applicable.

As described above, the DC power to be supplied to the LED module 1060 can be secured without passing through the dial position of the operation unit 1047 of the light control device 1040. Therefore, the low Kelvin for the LED drive current I _lowk and high Kelvin for the LED drive current I _hik can be adjusted to as 26 (a) and (b).

That is, at the end of the first step (dimming mode), the driving current I _lowk and the driving current I _hik can be supplied with the same amount of driving current as shown in Fig. 26 (a). On the other hand, when the dial is moved to the position at 13:00, for example, in the toning mode, as shown in Fig. 26B, the driving current I _hik increases while the driving current I _lowk decreases. It becomes white with blue as a whole. Such an operation is realized by changing the ratio of the driving current I _hik and the driving current I _lowk by the PWM circuit built in the balance circuit 1082.

As shown in Figs. 26A and 26B, the LED groups 60a and 60b have a pulse current of time t1 at a ratio of time determined by the balance circuit 1082 in one cycle period of an alternating current. Is supplied. In the example shown in Fig. 26A, the same number of pulse currents are supplied to the LED groups 1060a and 1060b. In contrast, in Fig. 6B, four pulse currents are supplied to the LED group 1060b, while two pulse currents are supplied to the LED group 1060a. In this way, the ratio of currents is changed, but the total number of pulses is not changed. In other words, the total value of the drive currents is constant. Therefore, the color temperature can be changed while the luminance is held.

In the sixth embodiment, dimming and dimming of the LED lighting fixture 1050 can be achieved by using the existing wiring provided for the incandescent bulb and the existing triac dimmer (dimming device 1040). That is, by controlling the operation history of the operation unit 1047 (dial) of the dimming device 1040, that is, the firing phase angle (conduction time) of the triac, on the LED lighting device 1050 side, the two controls of the dimming mode and the dimming mode are controlled. Realize the mode. For this reason, the two functions of dimming and dimming can be implemented using the existing dimming apparatus 1040, without carrying out wiring work.

According to the sixth embodiment, two controls of dimming and dimming can be realized by one dimming device 1040. For this reason, the LED lighting fixture which can perform dimming and dimming can be introduce | transduced very easily by changing the light bulb or light source of a load side to the LED lighting fixture 1050, without performing the replacement construction of a lighting control apparatus. .

For this reason, the lighting system which used the conventional incandescent light bulb and fluorescent lamp can be made high performance using the LED lighting fixture 1050. FIG. In addition, in white illumination, the color rendering property closer to the spectrum of sunlight can be realized. Moreover, according to the LED lighting fixture 1050, the color temperature of a wide range from daylight color to electric bulb color can be continuously changed with one LED lighting fixture.

In addition, in 1st Embodiment, the conduction time was measured based on the firing phase angle, and the structural example in which the history of the conduction time is recorded in the memory 1101 was shown. Instead of measuring the conduction time, instead of measuring this configuration, the firing phase angle may be detected every predetermined cycle (for example, one cycle), and the history of the firing phase angle may be recorded in the memory 1101. Note that although the history of the firing phase angle (conduction time) is recorded in the memory 1101, the last detected firing phase angle (conduction time) may be recorded in the memory 1101.

[Seventh Embodiment]

Next, a seventh embodiment of the present invention will be described. Since the seventh embodiment has the same configuration as that of the sixth embodiment, the differences are mainly described, and the description of the same configuration as the first embodiment is omitted.

In the seventh embodiment, unlike the sixth embodiment, by replacing the existing triac dimmer (dimming device 1040) with a new dimming device, two functions of dimming and dimming are realized only by a small wiring apparatus replacement work. By this, high convenience is realized.

27 is a diagram illustrating a circuit configuration example of the LED lighting system according to the seventh embodiment. The LED lighting system includes a dimming device 1040A and an LED lighting fixture 1050A. In the seventh embodiment, the same existing wirings as the sixth embodiment (the bus line 1010, the feed line 1020, and the lead line 1030) are used.

In the seventh embodiment, a light modulation apparatus 1040A having two or more operation units that are an operation unit for dimming and an operation unit for dimming is applied. For this reason, it is possible to provide the LED lighting system with improved convenience than the sixth embodiment.

The dimming device 1040A includes a pair of IGBTs (insulated gate type bipolar transistors) as the first and second molding portions. The IGBT is a small voltage input signal that can open and close the high voltage output. Since the IGBT is a single bipolar transistor, as shown in Fig. 27, two IGBTs 1048 and 1049 are connected in series in reverse polarity. Each of the IGBTs 1048 and 1049 includes diodes 1032 and 1033.

The light control apparatus 1040A is equipped with the operation part 1047a (1st user interface) for light control, and the operation part 1047b (2nd user interface) for color adjustment. Each of the operation unit 1047a and the operation unit 1047b has a dial (knob) for adjusting each of luminance and color temperature. A signal indicative of the amount of operation of each of the operation units 1047a and 1047b is given to the logic circuit 1400.

The logic circuit 1400 includes two rotary encoders (not shown) which detect respective manipulation amounts (rotation angles of the dials) of the operation units 1047a and 1047b, respectively. The logic circuit 400 supplies the signals 1408 and 1409 to the gates of the IGBTs 1048 and 1049 at timing according to the dial position (detection position of the rotary encoder) of the operation unit 1047a. The signal 1408 is a reverse current which stops the current between the collector and the emitter for a predetermined period, and the output timing of the signals 1408 and 1409 depends on the dial position of the operation unit 1047a. The signals 1408 and 1409 are supplied to the gates of the IGBTs 1048 and 1049 so that the currents flowing between the collector-emitters of the IGBTs 1048 and 1049 (currents flowing in the positive half cycle of alternating current from a commercial power supply) The conduction of can be stopped for a predetermined period (for example, 1 ms).

28 is a diagram illustrating a relationship between the manipulated variable of the operation unit 1047a and the AC waveform. As shown in Fig. 28 (a), in each half cycle of the alternating current, pulse signals (signals 1408 and 1409) corresponding to the amount of operation of the operation unit 1047a shown in Fig. 28 (b) are generated, and the IGBTs are generated. To the gate of (1048, 1049). For this reason, in each cycle of the government, the alternating current is cut off for a predetermined period t4 (for example, 1 ms).

For this reason, the half cycle of the positive and negative AC voltages from the commercial power supply becomes a waveform in which only a predetermined period t4 is interrupted at the interruption timing according to the output timing of the signals 1408 and 1409 according to the operation amount of the operation unit 1047a. AC voltage having such a waveform is supplied to the LED luminaire 1050A. Since the predetermined period t4 is shorter than the half cycle period (10 ms: 50 Hz) equal to 1 ms, the AC voltage can be considered to be almost a sine wave.

The timing of the interruption by the pulse signal (signal 1408) in the half cycle of alternating current depends on the amount of rotation (operation amount) of the dial of the operation portion 1047a, that is, the amount of control of luminance. As shown in Figs. 28 (c) and 28 (e), the output timings of the signals 1408 and 1409 are advanced as the amount of operation of the dial increases in the direction of increasing brightness, and in the half cycle of alternating current Interruption timing is faster. For this reason, the waveform of the half cycle of the stationary part of the alternating voltage supplied to LED lighting fixture 1050A can be made into the state (embedded) in which the control signal for brightness adjustment was embedded.

The logic circuit 1400 also supplies a signal 1409 according to the dial position of the operation unit 1047b to the gate of the IGBT 1049. By supplying the signal 1409, the current flowing between the collector-emitter of the IGBT 1049 can be stopped (blocked) for a predetermined time (for example, 1 ms) in a negative half cycle of alternating current from a commercial power supply. .

29 is a diagram illustrating a relationship between an operation amount of the operation unit 1047b and an AC waveform. As shown in Fig. 29 (a), in the negative half cycle of alternating current, the pulse signal (signal 1409) shown in Fig. 29 (b) is generated and given to the gate of the IGBT 1049. As a result, the alternating current is interrupted for a predetermined period t4 (for example, 1 ms) in the negative cycle.

Therefore, the negative half cycle of the AC voltage from the commercial power supply becomes a waveform in which only a predetermined period t4 is cut off at the cutoff timing according to the output timing of the signal 1409. AC voltage having such a waveform is supplied to the LED luminaire 1050A. Since the predetermined period t4 is shorter than the half cycle period (10 ms: 50 Hz) equal to 1 ms, the AC voltage can be considered to be almost a sine wave.

The timing of the interruption by the pulse signal (signal 1409) in the negative half cycle of alternating current depends on the amount of rotation of the knob of the operation unit 1047b, that is, the amount of control of the color temperature. As shown in Fig. 29 (c) and Fig. 29 (d), the output timing of the signal 1409 is advanced as the operation amount of the knob increases in the direction of lowering the color temperature, so that the interruption timing in the negative half cycle of alternating current is increased. Faster. For this reason, the waveform of the negative half-cycle of the alternating voltage supplied to 1050 A of LED lighting fixtures can be made into the state (embedded) in which the control signal for color temperature adjustment was embedded.

As described above, when the operation unit 1047a is operated, the cutoff position (blocking phase angle) changes in the half cycle of the government due to the generation of the signals 1408 and 1409. On the other hand, when operating the operation part 1047b, only the signal 1409 generate | occur | produces, and only the cutoff position (blocking angle) changes in negative half cycle. This is for the control device side to determine that the case where the government cutoff position changes at the same time as the control signal for dimming, and to determine the case where only the negative cutoff position changes as the control signal for toning. First of all, the operation unit 1047a may be an operation unit for color adjustment, and the operation unit 1047b may be an operation unit for dimming. Moreover, only the signal 1408 may generate | occur | produce by operation of the operation part 1047b, and only the interruption | blocking position may change in positive half cycle.

LED luminaire 1050A includes a cutoff angle detection circuit 1090A. The detection circuit 1090A uses a rectifying circuit 1091 for converting the alternating current supplied from the light control device 1040A into a direct current, and a direct current voltage for operating the microcomputer 1100 from the direct current voltage output from the rectifying circuit 1091. The generated constant voltage source 1092 and the angle detection circuit 1093A for detecting the interruption timing in half cycles of alternating current are provided.

The angle detector 1093A detects the cutoff phase angle θ in each half cycle of the government unit, and passes it to the distribution unit 1102A (determination unit) of the microcomputer 1100. The distribution unit 1102A records the blocking phase angle θ in the memory 1101 as history information in each half cycle of the government. At this time, when the distribution unit 1102A detects the cutoff phase angle θ of the positive part in one cycle, the distribution part 1102A compares each cutoff phase angle θ with the cutoff phase angle θ of the last recorded in the memory 1101. At this time, when both of the blocking phase angles θ of the government are fluctuating (has a difference), the distribution unit 1102A determines the detected blocking phase angle θ based on the determination that the dimming operation has been performed. Send to)

On the other hand, in the comparison of the blocking phase angle θ, when only the negative blocking phase angle θ fluctuates, the distribution unit 1102A determines the detected blocking phase angle θ based on the determination that the toning operation has been performed. (1104).

The configuration of the brightness adjusting unit 1103, the color temperature adjusting unit 1104, and the LED module 1060 is almost the same as in the sixth embodiment. That is, the brightness adjusting unit 1103 controls the supply of the drive current by the constant current circuit 1081 so that the LED module 1060 emits light with the brightness according to the blocking phase angle θ. That is, the brightness adjusting unit 1103 controls the constant current circuit 1081 so that a predetermined driving current is supplied to the LED module 1060 according to the blocking phase angle θ.

For example, in the case where the AC voltage waveform supplied to the LED luminaire 1050A is Fig. 28 (a), the luminance adjusting unit 1103 is because the blocking phase angle θ is located in the second half of the positive (negative) half cycle. It is interpreted that the user wants light emission of the LED module 1060 at low luminance. On the premise of such an analysis, the brightness adjusting unit 1103 controls the constant current circuit 1081 so that the drive current is supplied at a relatively small drive current value predetermined for the cutoff phase angle θ.

In addition, when the AC voltage waveform is shown in Fig. 28 (c), since the luminance adjustment unit 1103 is located at half the half cycle of positive (negative), the LED module 1060 at a medium luminance Is interpreted as wanting light emission. On the premise of such an analysis, the brightness adjusting unit 1103 controls the constant current circuit 1081 so that the driving current is supplied at a relatively medium driving current value predetermined for the blocking phase angle θ.

In addition, when the AC voltage waveform is shown in Fig. 28 (e), since the luminance adjusting unit 1103 is positioned in the first half of the half cycle of positive (negative), the user is led to the LED module 1060 at high luminance. Interpret that you want to emit light. On the premise of such an analysis, the brightness adjusting unit 1103 controls the constant current circuit 1081 so that the driving current is supplied at a relatively high driving current value predetermined for the blocking phase angle θ. Above all, the above example does not indicate that the luminance is controlled in three stages, but luminance control in two or more stages in accordance with the value of the cutoff phase angle θ is possible.

The color temperature adjusting unit 1104 controls the operation of the balance circuit 1082 so that the LED module 1060 emits light at the color temperature according to the negative cutoff phase angle θ. That is, the color temperature adjusting unit 1104 may include a LED group 1060a (a low color temperature LED (low Kelvin temperature LED)) and an LED group 1060b constituting the LED module 1060 at a ratio of driving current according to a negative blocking phase angle θ; High color temperature LED: Supply driving current to each of the high Kelvin temperature LEDs).

For example, when the AC voltage waveform supplied to the LED lighting fixture 1050A is FIG. 29 (a), the blocking phase angle θ is located in the second half of the negative half cycle. In this case, on the premise that the user wants to emit light of the LED module 1060 at a high color temperature, the color temperature adjusting unit 1104 has a predetermined balance (ratio) with respect to the blocking phase angle θ, and the LED group 1060a. And the balance circuit 1082 so that the drive current is supplied to 1060b.

In addition, when the AC voltage waveform supplied to the LED lighting fixture 1050A is FIG. 29 (c), the cutoff phase angle θ is located at half of a negative half cycle. In this case, on the premise that the user wants to emit light of the LED module 1060 to the complexion temperature, the color temperature adjusting unit 1104 is a predetermined balance (ratio) with respect to the blocking phase angle θ, and the LED group 60a. And the balance circuit 82 so that the drive current is supplied to 60b).

In addition, when the AC voltage waveform is shown in Fig. 29 (c), the cutoff phase angle θ is located in the first half of the negative half cycle. In this case, on the premise that the user wants to emit light of the LED module 1060 at a low color temperature, the color temperature adjusting unit 1104 is an LED group 1060a with a balance (ratio) predetermined for the blocking phase angle θ. And the balance circuit 1082 so that the drive current is supplied to 1060b. Above all, the above example does not indicate that the color temperature is controlled in three steps, but color temperature control in two or more steps is possible according to the value of the cutoff phase angle θ.

In addition, the blocking phase angle θ is recorded in the memory 1101 in the normal cycle based on the signals 1408 and 1409. For this reason, when the cutoff angle θ is not detected by the angle detection circuit 1093, the distribution unit 1102A uses the brightness adjusting unit 1103 and the color temperature adjusting unit to set the cutoff phase angle θ of the last recorded in the memory 1101. To 1104. For this reason, the luminance and color temperature are maintained even when the time t4 is zero, that is, the cutoff time of t4 expires.

According to the seventh embodiment, the dimming device 1040A has an operation unit 1047a for adjusting luminance and an operation unit 1047b for adjusting color temperature. For this reason, the user can perform dimming operation and dimming operation independently of each other. For this reason, compared with 6th Embodiment, the LED illumination system with which operability was improved can be provided.

Also in the seventh embodiment, in order to use the existing wiring equipment, significant wiring work by the introduction of the LED lighting equipment 1050A can be avoided, and the initial cost at the time of the LED lighting equipment 50A introduction can be reduced. We can plan.

[Eighth Embodiment]

Next, an LED lighting system according to an eighth embodiment of the present invention will be described. It is a figure which shows the structural example of the LED lighting system which concerns on 8th Embodiment. The LED lighting system roughly includes a dimming device (dimming / coloring controller C) and an LED lighting device (LED light emitting device) 800.

The light control device C has a pair of terminals T201 and T202 and another pair of terminals T203 and T204. The terminals T201 and T202 are connected to a pair of commercial power supply buses 1010 that supply commercial power (for example, AC 100V, 50 or 60 Hz). The terminal T203 is also connected to the commercial power supply bus line 1010. The terminal T204 is connected to the terminal T205 among the pair of terminals T205 and T206 included in the LED lighting apparatus 800 through the feed line 1020a. The terminal T206 is connected to the other side of the commercial power bus 1010.

The dimming device C includes the main power switch 141 described in the second embodiment (Fig. 4), the power supply circuit 140 as the direct current generating unit, the microcomputer 180A as the first and second control units, and the first and second. XY switch 185 is provided as an operation part. Since these details were demonstrated in 2nd Embodiment, description is abbreviate | omitted. However, the power supply circuit 140 does not have to have a generation function of DC 24V as described in the second embodiment.

On the other hand, the light control apparatus C is provided with the control signal generation circuit 191 as a control signal generation part. In the present embodiment, the microcomputer 180 displays a digital value indicating luminance as control information for dimming and toning from the manipulation amount (control amount; bit value represented by bits b0 to b5) of dimming and toning input from the XY switch 185. (Luminance value) and a digital value (color temperature value) indicating chromaticity (color temperature in the present embodiment).

For example, the microcomputer 180A has a digital value representing the luminance value and a recording medium (memory) holding the digital value representing the color temperature. As the "U" button and the "D" button of the XY switch 185 are pressed, the luminance value (digital value) held in the memory is increased or decreased (updated). The microcomputer 180A outputs the held luminance value to the signal line 180a. On the other hand, the microcomputer 180A increases or decreases the color temperature value (digital value) held in the memory as the "H" button and the "L" button are pressed. The microcomputer 180A outputs the held color temperature value to the signal line 180b. In addition, each digital value is represented by a predetermined number of bits.

The control signal generation circuit 191 generates a control signal including control information by using an AC waveform supplied from commercial power. The control signal generation circuit 191 is connected to the microcomputer 180A through the signal lines 180a and 180b, and the luminance value and the color temperature value output from the microcomputer 180A are input. The control signal generation circuit 191 generates a control signal for dimming and toning according to the luminance value and the color temperature value by processing the waveform of the sine wave from the commercial power source input from the terminal T203, and outputs it from the terminal T204. do. For this reason, the control signal for dimming and toning is sent to the LED luminaire 800.

As a detailed structure of the control signal generation circuit 191, the following can be illustrated. For example, as shown in FIG. 31, the control signal generation circuit 191 may include a triac 192 and a triac arc control circuit 193 (first form). The firing control circuit 193 controls the firing of the triac 192 according to the control information (luminance value and color temperature value) relating to dimming and toning from the microcomputer 180A with respect to the government's half cycle for the sinusoidal wave of commercial alternating current. Control timing.

That is, the firing control circuit 193 supplies, to the triac 192, a trigger signal for firing at a firing phase angle according to the other half of the luminance value and the color temperature value (for example, the luminance value). . On the other hand, the firing control circuit 193 supplies, to the triac 192, a trigger signal for firing at a firing phase angle corresponding to the other half of the negative half cycle (eg, the color temperature value) of the luminance value and the color temperature value. The triac 192 conducts alternating current from the commercial power supply supplied from the terminal T203 in the firing period from when the trigger signal is obtained until the voltage becomes zero.

Therefore, the alternating current from a commercial power supply is output as a control signal from the terminal T204 of the light control device C in the conduction period corresponding to each of a luminance value and a color temperature value. The LED lighting device 800 recognizes the firing phase angle in each half cycle of the triac 192 from the AC waveform (control signal waveform) input from the terminal T205, and calculates the luminance value from the firing phase angle. Control information relating to color matching and light control corresponding to the color temperature value can be obtained.

Alternatively, the control signal generation circuit 191 may have a second form shown in FIG. 32. The second aspect may include a logic circuit 1400A as described in the seventh embodiment and a pair of IGBTs 1048 and 1049 (including diodes 1032 and 1033). In the control signal generation circuit 191 of the second aspect, the logic circuit 1400A performs an IGBT 1048 at a timing corresponding to one of the luminance value and the color temperature value supplied from the microcomputer 180A (eg, the luminance value). Gives a signal to the gate. On the other hand, the logic circuit 1400A signals the gate of the IGBT 1049 at a timing corresponding to the other of the luminance value and the color temperature value (for example, the color temperature value).

For this reason, the sine wave from a commercial power supply turns into a waveform (control signal) including the cutoff part corresponding to a luminance value and a color temperature value in each half cycle of the sinusoidal part as shown in FIG. Such an AC waveform (control signal) is output from the terminal T204 and supplied to the LED lighting device 800. In the LED lighting device 800, control information corresponding to the luminance value and the color temperature value can be obtained from the position (blocking phase angle) of the cutoff portion of the AC waveform input from the terminal T205.

The LED lighting fixture 800 includes a terminal T205, a power supply circuit 801 connected to the terminal T206, a power supply circuit 802, a control circuit 803 including a microcomputer, and a digital / analog converter (D / A). A converter 804. In addition, the LED lighting fixture 800 is provided with the total current specification circuit 839, the individual current value adjustment circuit 840, and the same LED module 1060 as 6th Embodiment.

The power supply circuit 801 has a rectifying circuit for converting commercial power alternating current from the bus line 1010 into direct current, while generating a voltage (for example, 24V) for driving LED and outputting it to the wiring 806. The power supply circuit (constant voltage source) 802 obtains a voltage (for example, 3.3V) for the operation of the control circuit 803 from the voltage from the wiring 806 and inputs it to the control circuit 803.

The structure of the control circuit 803 shown in FIG. 33 is applied to the 1st form shown in FIG. In Fig. 33, the control circuit 803 includes a firing phase angle detection circuit 1093 and a microcomputer 803A for detecting the firing phase angle. The microcomputer 803A operates in accordance with an operating clock supplied from the crystal oscillator 805 (Fig. 30). The microcomputer 803A includes a memory 1101, a distribution unit 1102, a brightness adjusting unit 1103A, and a function which are realized by a program (not shown) included in the microcomputer 803A executing a program. And a color temperature adjusting unit 1104A.

The firing angle detection circuit 1093 finds the firing phase angle in half cycle of the government in the control signal supplied from the dimmer C. FIG. The distribution unit 1102A passes the positive firing phase angle to the luminance adjusting unit 1103A, and passes the negative firing phase angle to the color temperature adjusting unit 1104A.

The luminance adjusting unit 1103A refers to the correspondence table (not shown) held in association with the firing phase angle and the luminance value held in the memory 1101, and the luminance corresponding to the firing phase angle obtained from the distribution unit 1102A. Get the value from the corresponding table. Thus, the luminance value output by the microcomputer 180 can be obtained (restored). The luminance value is output to the wiring 811.

The color temperature adjusting unit 1104A refers to the color temperature corresponding to the firing phase angle obtained from the distribution unit 1102A with reference to the correspondence table (not shown) held in association with the firing phase angle and the color temperature value held in the memory 1101. Get the value from the corresponding table. The color temperature value includes a color temperature value for the LED group 1060a to be output to the wiring 812 and a color temperature value for the LED group 1060b to be output to the wiring 813. Each color temperature value is output to the wirings 812 and 813.

32, the structure of the control circuit 803 shown in FIG. 34 is applied. In FIG. 34, the control circuit 803 is the same as the structure shown in FIG. 33 except for providing the angle detection circuit 1093A instead of the firing phase angle detection circuit 1093 (blocking phase).

The angle detection circuit 1093A detects the cutoff phase angle in half cycles of the left and right portions of the control signal. The distribution unit 1102A sends the cutoff phase angle to the brightness adjustment unit 1103A in the positive half cycle, and sends the cutoff phase angle to the color temperature adjustment unit 1104A in the negative half cycle. As described above, the control device 803 functions as a decoder that receives control signals for dimming and dimming from the light control device C and obtains luminance values and color temperature values from the control signals.

The total current defining circuit 839 includes an OP amplifier 831, a resistor 832, and a transistor 833. The individual current value adjustment circuit 840 includes OP amplifiers 841 and 842, resistors 846 and 843, and transistors 844 and 845.

The microcomputer 803A of the control circuit 803 is connected to the D / A converter 804 via the wirings 811, 812, and 813. The D / A converter 804 is connected to the wiring 806 through the wiring 821, the zener diode 834, and the resistor 835, and is connected to the OP amplifier between the zener diode 834 and the furnace resistor 835. The terminal of 831 is connected. The D / A converter 804 is connected to one terminal of the OP amplifier 841 via the wiring 822, and is connected to one terminal of the OP amplifier 842 via the wiring 823.

In the LED lighting device 800 as described above, when the operator pushes the U button of the XY switch 185 intentionally to increase the luminance, the luminance value output from the microcomputer 803A to the wiring 811 is decreased. The D / A converter 804 generates an analog potential in the wiring 821 in accordance with the luminance value.

As a result, the analog potential of the wiring 821 drops, and the base potential of the transistor 833 which is the output of the OP amplifier 831 also drops. The emitter current of the pnp transistor 833 increases. Therefore, the total current supplied to each LED group 1060a and 1060b of the LED module 1060 is increased so that the light emitted from the LED module 1060 becomes brighter than before (brightness is increased). On the other hand, when the D button of the XY switch 185 is pressed, the opposite operation occurs, and the light emitted from the LED module 1060 becomes dark.

When the operator presses the H button of the XY switch 185 intentionally to increase the color temperature, the color temperature value output from the microcomputer 803A to the wiring 812 increases, while the wiring 813 is connected from the microcomputer 803A. The color temperature value output to the display decreases. The D / A converter 804 generates an analog potential corresponding to the color temperature value from the wiring 812 to the wiring 822, while the analog potential corresponding to the color temperature value from the wiring 813 to the wiring 823. To produce.

As a result, the analog potential of the wiring 452 rises, the base potential of the npn transistor 844 that is the output of the OP amplifier 841 also rises, and the collector current of the npn transistor 844 increases. On the other hand, the base potential of the npn transistor 845 that is the output of the OP amplifier 842 drops, and the collector current of the npn transistor 845 decreases.

Therefore, the light emission amount of the LED group 1060a having a high color temperature is larger than the light emission amount of the LED group 1060b having a low color temperature, and the color temperature of the LED module 1060 is increased as a whole to indicate a white color with blue color. When the L button of the XY switch 185 is pressed with the intention of lowering the color temperature, the opposite operation occurs, and the amount of light emitted by the LED group 1060a decreases and the amount of light emitted by the LED group 1060b increases. , The color temperature of the LED module 1060 is lowered. By this operation, it is possible to adjust the brightness and color temperature of the LED module 1060 to a desired value.

In addition, in the example shown in FIG. 30, the total current regulation circuit 839 independent from the individual current value adjustment circuit 840 is provided. On the other hand, with respect to the individual current value adjustment circuit 840, on the basis of the luminance value obtained by the microcomputer 803A, the LED group in a state where the ratio of the average currents supplied to the LED groups 1060a and 1060b, respectively, does not change. It is possible to modify the output of control values to increase or decrease the average current supplied to 1060a and 1060b from the wirings 812 and 813. According to such a modification, the luminance adjustment can also be performed by the individual current value adjustment circuit 840, so that the configuration of the total current specifying circuit 839 can be omitted.

In embodiment described above, a structure can be combined suitably in the range which does not deviate from the objective of this invention.

10A ... AC power input terminal
20 LED lighting devices (LED light emitting devices)
22A ... LED Group (First LED Group)
22B ... LED group (second LED group)
23A, 23B
90 ... half-wave voltage rectification circuit
100 clock generation circuit
101, 102 ... Comparators (Comparators: OP Amplifiers)
110 duty cycle adjustment circuit
120 ... push-pull drive circuit
130 ... driving pulse generation / variable circuit
183 DC power supply circuits
141 ... main power switch
150 ... H type full bridge control circuit
151 ... control circuit
160 drive current detection circuit
165 resistors
161, 162 ... photo couplers
163, 164 Integral circuit
200, 200A, 201, 201A, 202A, 221, 222, 301, 312, 322
170 ... Polarity switch
180 microprocessor
185 ... XY switch
186 ... Timer Counter
186A ... microprocessor
A ... dimmer
B, B1 ... lighting control device (lighting control device)
400 ··· commercial power bus
401 ... feeders for lighting equipment
402 ... lead wire for flashing lighting device
403 ... virtual ship
410 ... light control device (light control box)
412 DC power supply circuit (power supply circuit)
413 control circuit
414, 415 DC power supply lines
416 ... operating part
416A, 416B ... Operation dial
417 ... Amount of operation detection unit (signal generator)
417A, 417B ... Variable resistor
418, 419 ... signal lines
420 ... control device
421 ... oscillator
430
431 Drive logic circuit
432 ... driving circuit

Claims (8)

An LED lighting device comprising a first LED and a second LED having different chromaticities and connected in parallel with opposite polarities, and an LED lighting system including a dimming device,
The dimmer is
A direct current generating unit for generating a direct current power source from the alternating current received from the alternating current power source,
A first operation unit for manipulating the luminance of the illumination light by the lighting of the first LED and the second LED;
A second operation unit for manipulating the chromaticity of the illumination light by the lighting of the first LED and the second LED;
A first control section for determining the total amount of the average current to be supplied to the first LED and the second LED at predetermined intervals according to the operation amount of the first operation section;
A second control section for determining a ratio of an average current to be supplied to each of the first LED and the second LED at each predetermined period, according to an operation amount of the second operation section;
By using the DC power supply obtained by the DC generator, for each predetermined period, a crystal to be supplied to the first LED having a ratio of the total amount of average current and the average current determined by the first and second control units. And a supply unit for generating an alternating current including one of positive or negative current and the other of positive or negative current to be supplied to the second LED and supplying the alternating current to the LED lighting device. The method according to claim 1,
The first control unit compares a triangular wave voltage having the same period as the AC voltage of the AC power supply and a reference voltage according to an operation amount of the second operation unit, which defines a slice level of the triangular wave voltage, to form a square wave of a government. A comparator for outputting a voltage,
The second control section is a pulse width adjustment circuit that determines the duty ratio of the current to be supplied to the LED lighting device in each of the periods of the government in one cycle of the government square wave voltage according to the operation amount of the first operation unit. Including,
The supply unit supplies a positive current at a duty ratio determined by the pulse width adjusting circuit to one of the first and second LEDs in a positive period of the square wave voltage of the step, and to a negative period of the square wave voltage of the step. The LED lighting system according to claim 1, wherein a negative current is supplied to the other of the first and second LEDs at a duty ratio determined by the pulse width adjusting circuit. The method according to claim 1,
The supply unit inputs a positive pulse and a negative pulse at each predetermined period, and supplies a time when a positive pulse is on and a positive current to the LED lighting device, while providing a time when a negative pulse is on and a negative current. A driving circuit for supplying the
The first control unit determines the on time of the positive pulse and the on time of the negative pulse in the predetermined period according to the operation amount of the first operation unit,
And the second control unit determines a ratio of the on time of the positive pulse and the on time of the negative pulse in the predetermined period according to the operation amount of the second operation unit. The method according to claim 3,
The first control section determines, according to the operation amount of the first operation section, the number of pulses of the government which each have a predetermined pulse width in the predetermined period,
And the second control unit determines a pulse width of the government pulse. The method according to any one of claims 1 to 4,
The LED lighting system is connected to the LED lighting device only via the wiring of the two dimming device. A dimming device connected with an LED lighting device including a first LED and a second LED having different emission wavelength ranges connected in parallel with opposite polarities,
A DC generator for generating DC power from AC received from AC power;
A first operation unit for manipulating the luminance of the illumination light by the lighting of the first LED and the second LED;
A second operation unit for manipulating the color or color temperature of the illumination light by turning on the first LED and the second LED;
A first control section for determining the total amount of the average current to be supplied to the first LED and the second LED at predetermined intervals according to the operation amount of the first operation section;
A second control section for determining a ratio of an average current to be supplied to each of the first LED and the second LED at each predetermined period, according to an operation amount of the second operation section;
By using the DC power supply obtained by the DC generator, for each predetermined period, a crystal to be supplied to the first LED having a ratio of the total amount of average current and the average current determined by the first and second control units. Or a supply unit for generating an alternating current including the one of the negative current and the other of the positive or negative current to be supplied to the second LED and supplying the alternating current to the LED lighting device. An LED lighting device comprising a first LED and a second LED having different chromaticities and a dimming device,
The dimmer is
A DC generator for generating DC power from AC received from AC power;
A first operation unit for manipulating the luminance of the illumination light by the lighting of the first LED and the second LED;
A second operation unit for manipulating the chromaticity of the illumination light by the lighting of the first LED and the second LED;
A first control section for determining the total amount of the average current to be supplied to the first LED and the second LED at predetermined intervals according to the operation amount of the first operation section;
A second control section for determining a ratio of an average current to be supplied to each of the first LED and the second LED at each predetermined period, according to an operation amount of the second operation section;
The current to be supplied to the first LED having a ratio of the total amount of the average current and the average current determined by the first and second control units at each predetermined period, using the DC power source obtained by the DC generator. And a supply unit generating a current to be supplied to the second LED and supplying the current to the LED luminaire. A first LED and a second LED having different chromaticities;
A direct current generator generating direct current from alternating current,
Receiving means for receiving from the light control apparatus information on the total amount of the average current to be supplied to the first LED and the second LED, and ratio information of the average current to be supplied to each of the first and second LEDs; ,
Calculating means for calculating the total amount of the average current and the ratio of the average current using information from the receiving means for obtaining the total amount and the ratio of the average current from the total amount information of the average current and the ratio information of the average current;
And a supply means for generating a current according to the total amount of the average current and the ratio of the average current from the current generated by the direct current generator to supply the first LED and the second LED.

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